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School: UCLA
Course: NATURE OF THE UNIVERSE
ANSWER KEY ASTRONOMY 3 Prof. McLean Dept. Physics & Astronomy UCLA Mid-Term 1 January 25, 2011 Read these Instructions Please bubble-in your name and student ID number on the Scantron. If you do not, there will be no record that you took this exam! Read t
School: UCLA
Course: Astro 5
Astronomy 5 Midterm Monday, October 31, 2011, 2:003:15 PM Name: _ (enter it also on the scantron) Part I: Multiple Choice Use the scantron to answer the questions from this section. In each case, choos
School: UCLA
Course: NATURE OF THE UNIVERSE
V1.0 Nature of Universe (Astronomy 3) PAB 1425 TR 11AM-12:15PM Instructor Class S. A. Isaac Mognet Department of Physics and Astronomy Oce: 3-546 PAB Oce Hours: E-mail: mognet@astro.ucla.edu Phone: (310) 794-9455 TBD Other times by Appointment Astronomy 3
School: UCLA
The Origin and Evolution of Life on Earth Stromatolites Stromatolites are rocks characterized by a distinctive, layered structure. In size, shape and interior structure, ancient stromatolites look virtually identical to sections of mats formed today by
School: UCLA
2/16/2015 Rare Earth Hypothesis and the Fermi Paradox Is Earth Rare? MANY things had to go right for life to exist on Earth. Are we alone in the Universe? Our Sun is the right distance from the center of the galaxy too close, and youre blasted with radiat
School: UCLA
https:/ccle.ucla.edu/course/view/15W-ASTR5-1 REMINDER ASTRONOMY 5 Life in the Universe Professor Ian McLean Office: Physics & Astronomy Building (PAB) 3-939 Office Hours: 3-5 pm Tue/Thu mclean@astro.ucla.edu Teaching Assistant: Alec Vinson Text Book: Life
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astro 4 Final Review HR diagram o If star is moving horizontally: o How long before sun exhausts fuel o Its getting cooler, expanding (redder) 5 billion years Ex. R = 166Rsun, T = 3100k; whats luminosity? L/Lsun = R/Rsun2 T/Tsun4 = 1662 * 3100/58004 = 220
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture135/12/15 Howtodetect o LNS/Lsun=RNS/Rsun2xTNS/Tsun4 Pulsars:evidencethatNSexists o o Radiopulsesatregularintervalsbetween0.001to10sec o Spectrumoftimevsintensity o Eachpulsarwouldhaveapulseprofile o Sourcesofradiowaves AnotherpulsardiscoveredinCra
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture3 NewHWuponline Showallworkforfullcredit Reviewfromlattime o o Mass,momentum,angularmomentum,force o Newtonslaws o Uniformscircularmotion,centripetalacc o Energy:kinetic(motion,temp),potential(stored) o Vectors,motion Conservationofmomentum,angular
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture8 Apparentbrightnessorflux=Aswegetfartheraway,theSAgetsbiggerandtheapparent brightnesslessens o Flux=L/(4pid2) Units=watts/m2 MassesofSatrs o Massdetermines o Starsluminosity Starsspectraltype(ietemp) Measureddirectlyby Observingtheeffectwhichgravi
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture6 BasicPropertiesoftheSun o o Densityofaboutwater CompositionmainlyH(70%),He(28%) Layers o Core o Radiation o Convection o SolarAtmosphere Photosphere Radiationsmostofsunsenergywhatweseeinvisiblelight Chromosphere Corona o Hotandtenuous SolarWind S
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture5 Pickupgradedhwin1707P&Abuilding Review o Spectra:continous,absorption,emission o Infocarriedbyyspectra:temperature,composition,velocity o TemperatureThermal/blackradiation: F(brightness)=T^4 Hotterobjectsarebluer,peaksearlier RulesforEmissionbyOp
School: UCLA
Course: Astro 5
1. Brian Friel has claimed that his play Translations has to do with language and only with language. Discuss this claim with reference to both overarching themes and specific moments in the text. My take on his statement Friels claim is partially true th
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Professor Alice Shapley Lecture 4: Light & Thermal Radiation (Ch. 5) Announcements Late hw turned in to TAs (Jesus or Danny) HW #2, due Tuesday, April 14th, in class. Check your e-mail, or download from
School: UCLA
3/1/2015 What have we learned? Challenges for Habitability The vastness of Space What have we learned? ~400billionstarsinourgalaxyalone. StaroftypesG(7%),K(15%)andM (75%)=97%ofallstarsinthegalaxy. OurexistenceprovesthatGstarscan havehabitablezones. Ke
School: UCLA
Getting to space defying gravity The Rocket Equation: v = ve ln (M ) M i Example: to get 2,000 lbs into orbit you need 22,000 lbs of fuel, and a rocket that gives 4.5 km/s exhaust velocity. f Interstellar Space Travel The challenge A scene from AVATAR as
School: UCLA
2/21/2015 Characterization of Exoplanets Launched: March 7, 2009. Keplerobservestransits,which yieldstheradius oftheexoplanet andthereforethedensitywhen weknowthemassfromDoppler velocitymeasurements. Kepler 11 artists impression Exoplanet Statistics 1,03
School: UCLA
Whats going on? 51 Peg: the rhythmic wobble in the spectrum gave an orbital speed of 57 meters per second. The repetitive 4-day period of the stars motion tells us the orbital period of its planet. With a period of 4 days, this planet is really close to
School: UCLA
Stars and Stellar Evolution Star and Stellar Evolution Stars are giant, balls of hydrogen/helium gas at very high temperatures. Stars are held together by their own gravity. The temperature at the center of a star is very high, so spontaneous thermal n
School: UCLA
Course: NATURE OF THE UNIVERSE
ANSWER KEY ASTRONOMY 3 Prof. McLean Dept. Physics & Astronomy UCLA Mid-Term 1 January 25, 2011 Read these Instructions Please bubble-in your name and student ID number on the Scantron. If you do not, there will be no record that you took this exam! Read t
School: UCLA
Course: Astro 5
Astronomy 5 Midterm Monday, October 31, 2011, 2:003:15 PM Name: _ (enter it also on the scantron) Part I: Multiple Choice Use the scantron to answer the questions from this section. In each case, choos
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Final Study Guide Below, you will nd a series of questions based on the lectures from the second half of the course. This list is by no means exhaustive, but represents a large chunk of what is important for the course. Remember, this test is
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Name: UID: Astronomy 4 Midterm Exam, Version A Tuesday, April 28th, 11:00 a.m. 12:15 p.m. DO NOT OPEN THIS EXAM UNTIL TOLD TO DO SO WHILE YOU ARE WAITING This exam is closed book. Calculators are allowed, but any quantitative problems have been set up so
School: UCLA
Preparation for Final Wednesday, March 18, from 11:30am-2:30pm Two Groups, two rooms: PLEASE NOTE Last Name A L : KNSY PV 1220B at 11:30am Last Name M Z : KNSY PV 1240B at 11:45am Please go to the correct room Multiple Choice Exam; I will provide Scantron
School: UCLA
Preparation for Midterm Thursday, February 5, in class starts at 9am Multiple Choice; I will provide Scantrons bring your own pencils and erasers. Test includes all material up through Jan 29. Review all Homework sets; be sure you know the correct ans
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 Homework 6 - solutions Problem 1 a) Use the formula for the Schwarzschild radius, Rsch = 2GM M Km = 3(1) Km = 3Km =3 2 c M In comparison with a normal White Dwarf, R = 0.01R 7000 Km The White Dwarf is 7000 Km = 2333 times bigger 3
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #7 Solutions Spring 2015 1. Gravitational Redshift (a) The spaceship is at r = 2RS , so using the gravitational redshift formula the frequency as observed by Earth will be smaller (because time is dilated near the black hole): 1 = 0.707 mi
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #5 Solutions Spring 2015 1. Properties of giant stars (a) The escape velocity of an object at a distance r from an object of mass M is given by vesc = 2GM/r. Applied to the surface of the Sun (using M = M = 2 1030 kg and R = R = 7 108 m).
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #1 Solutions Spring 2015 1. Workout with Scientic Notation and Units (a) 0.00000000000537 = 5.37 1012 (b) 26400000000000000 = 2.64 1016 (c) Using the conversion factor 1 AU = 1.5 1011 m: 7.0 1016 m 1 AU = 4.67 105 AU 1.5 1011 m (d) First
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #3 Solutions Spring 2015 1. Magnesium Energy Levels (a) The conversion factor is 1 eV = 1.602 1019 J, so 4.3458 eV 1.6 1019 J = 6.96 1019 J 1 eV (b) The photons energy will be exactly equal to the energy dierence between level 3 and 1, E
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Winter 2015 Homework 2 - solutions Problem 1 a) The acceleration of gravity is given by g= GM r2 Using G = 6.67 1011 m3 kg 1 s2 , M = 6 1024 Kg, and r = 6371000 m + 390000 m = 6.761 106 m, we get g = 8.75 m/s2 . b) The escape velocity is give
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Study Guide Below, you will nd a series of questions based on the lectures preceding the midterm exam. This list is by no means exhaustive, but represents a large chunk of what is important for the course so far. If you have questions
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Study Guide Below, you will nd a series of questions based on the lectures preceding the midterm exam. This list is by no means exhaustive, but represents a large chunk of what is important for the course so far. If you have questions
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Cheat Sheet Constants kB = 1.38 1023 Joules K1 h = 6.63 1034 Joules sec c = 3.00 108 m sec1 G = 6.67 1011 m3 kg1 sec2 = 5.67 108 Joules sec1 m2 K4 1 eV = 1.60 1019 Joules M (Sun) = 1.99 1030 kg M (Earth) = 5.97 1024 kg M (Jupiter) = 1
School: UCLA
Course: Life In The Universe
Midterm Review 58 MC Questions Jupiter 6 questions Earth formation and other planet formations (planetesmals) 1 question Extra Solar Planets 9 questions Supernova explosions 1 question Center of mass 2 questions 1. the center of mass in the solar system i
School: UCLA
Course: NATURE OF THE UNIVERSE
V1.0 Nature of Universe (Astronomy 3) PAB 1425 TR 11AM-12:15PM Instructor Class S. A. Isaac Mognet Department of Physics and Astronomy Oce: 3-546 PAB Oce Hours: E-mail: mognet@astro.ucla.edu Phone: (310) 794-9455 TBD Other times by Appointment Astronomy 3
School: UCLA
ASTRONOMY 5 LIFE IN THE UNIVERSE Fall, 2014 Instructor: F. V. Coroniti Office: Phone: (310) 825-3923 E-Mail: Coroniti@astro.ucla.edu Text: Custom Edition for Astronomy 5 UCLA - Pearson; taken from: Office Hrs: PAB 3-919 Monday 9 - 10 Am Friday 1- 2 Pm By
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Fall 2013 Lectures: TTh 9:30 am - 10:45 am, Kinsey Pavilion 1240B Discussion Section 1A: Th 2:00-2:50 pm, 2200 Young Hall, TA: Xinnan Du Discussion Section 1B: Th 3:00-3:50 pm, 5137 Math Sciences, TA: Ashwi
School: UCLA
Course: Astro 5
Psychology 10: Introduction to Psychology Young CS76, Tues/Thurs 8:00-9:50AM Instructors Weeks 1-7 W. David Stahlman, Ph.D. Office: Franz 8425B Office Hours: Wednesday 8-10:00am and by appointment E-mail: wstahlma@ucla.edu Weeks 8-10 Jennifer Shultz, Ph.D
School: UCLA
ASTR 3, LEC 1: Nature of the Universe MWF 12:00 pm -12:50 pm in Math Sciences 4000A SRS# 123 009 200 Professor Ian S. McLean Office PAB 3-939: mclean@astro.ucla.edu Office Hours: 3-5 pm Tu/Th Book: The Essential Cosmic Perspective, 5th ed. (loose leaf is
School: UCLA
Course: NATURE OF THE UNIVERSE
ANSWER KEY ASTRONOMY 3 Prof. McLean Dept. Physics & Astronomy UCLA Mid-Term 1 January 25, 2011 Read these Instructions Please bubble-in your name and student ID number on the Scantron. If you do not, there will be no record that you took this exam! Read t
School: UCLA
Course: Astro 5
Astronomy 5 Midterm Monday, October 31, 2011, 2:003:15 PM Name: _ (enter it also on the scantron) Part I: Multiple Choice Use the scantron to answer the questions from this section. In each case, choos
School: UCLA
Course: NATURE OF THE UNIVERSE
V1.0 Nature of Universe (Astronomy 3) PAB 1425 TR 11AM-12:15PM Instructor Class S. A. Isaac Mognet Department of Physics and Astronomy Oce: 3-546 PAB Oce Hours: E-mail: mognet@astro.ucla.edu Phone: (310) 794-9455 TBD Other times by Appointment Astronomy 3
School: UCLA
The Origin and Evolution of Life on Earth Stromatolites Stromatolites are rocks characterized by a distinctive, layered structure. In size, shape and interior structure, ancient stromatolites look virtually identical to sections of mats formed today by
School: UCLA
2/16/2015 Rare Earth Hypothesis and the Fermi Paradox Is Earth Rare? MANY things had to go right for life to exist on Earth. Are we alone in the Universe? Our Sun is the right distance from the center of the galaxy too close, and youre blasted with radiat
School: UCLA
https:/ccle.ucla.edu/course/view/15W-ASTR5-1 REMINDER ASTRONOMY 5 Life in the Universe Professor Ian McLean Office: Physics & Astronomy Building (PAB) 3-939 Office Hours: 3-5 pm Tue/Thu mclean@astro.ucla.edu Teaching Assistant: Alec Vinson Text Book: Life
School: UCLA
The Nature and Evolution of Habitability Our quest is a search for Life in the Universe. So far we have explored the solar system, and so far we are certain of life on only one planet Earth. Before we look to the stars, lets review what we have learned a
School: UCLA
Why did Mars change? Search for Life Elsewhere Mars and the Jovian moons Mars once had flowing water, and a thicker and warmer atmosphere of CO2 (a greenhouse gas). Mars now appears to have a sterile surface due to UV radiation from the Sun; hence the p
School: UCLA
1/11/2015 Geology and Life It is easy to take for granted the qualities that make Earth suitable for life The Habitability of Earth The Terrestrial Worlds Mercury craters smooth plains, cliffs Venus Mars Earth volcanoes few craters some craters volcanoes
School: UCLA
Defining Life Nature of Life on Earth The Cat and the Car Consider a cat and car! Both require energy to function The cat gets energy from food The car gets energy from gasoline Both can move at varying speeds and turn corners Both expel waste produ
School: UCLA
Course: NATURE OF THE UNIVERSE
Big Dipper and little Dipper, asterisms in Ursa Major and Ursa Miinor J. Lodriguss APOD 4/21/13 XMM telescope, ESA APOD chapters 2.1-2.3, 3 LIGHT, WAVES, &TELESCOPES wavelengths not in the visible or radio windows to observe at wavelengths in which the at
School: UCLA
Search for Life Elsewhere Venera 13 on Venus VENUS One day on Venus lasts as long as 243 Earth days (this is the time it takes for Venus to rotate or spin once). And Venus spins backwards! Venus makes a complete orbit around the Sun (a year in Venusian
School: UCLA
Telescopes and Observable Signatures The search for worlds around other stars The Challenge Other stars are very far away! Remember our 10 billion to one scale model? Sun = size of grapefruit; Earth is like the tip of a ball point pen placed 15 m (50 f
School: UCLA
Stellar life cycles and habitability All stars have life cycles. Habitability Outside the Solar System Discovery of Exoplanets Lets review the life cycles of stars and their impact on habitability. Starts with the gravitational collapse of a giant cloud
School: UCLA
Stars and Stellar Evolution Star and Stellar Evolution Stars are giant, balls of hydrogen/helium gas at very high temperatures. Stars are held together by their own gravity. The temperature at the center of a star is very high, so spontaneous thermal n
School: UCLA
Course: Astro 5
If the universe starts out as a hot plasma, then how did we end up with galaxies and stars? Dark matter dominates the universe (no one knows what the dark matter is) by a factor of 10. Formation of galaxies and stars depend on the existence of dark matter
School: UCLA
Final Exam Details Location: Moore 100 (across the street from MS4000A) Time/Date: 11:30am Tuesday, June 7 Dont be late! Multiple choice: 90 questions, 90 minutes Scantrons will be provided Exam is cumulative and will cover all 18 Chapters About 50% of t
School: UCLA
STUDY TIPS FOR MID-TERM #2 1. Make sure you know all the homework questions for the last two homework sets. 2. Go to the end of each Chapter and study the Summaries. Mid-Term 2 covers Chapters 7, 8, 9 10, 11 and 12. Know the definitions and key points of
School: UCLA
Mid-Term 1 Review Covers Chapters 1-6 Does not cover Labs Review my Lecture Notes and End-of-Chapter Summaries in the book Study all Homework sets done to date Make sure you know the correct answers Check out the sample questions in the Notes Mid-
School: UCLA
Final Exam Details Location: Moore 100 (across the street from MS4000A) Time/Date: 11:30am Tuesday, June 7 Dont be late! Multiple choice: 90 questions, 90 minutes Scantrons will be provided Exam is cumulative and will cover all 18 Chapters About 50% of t
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Professor Alice Shapley Lecture 4: Light & Thermal Radiation (Ch. 5) Announcements Late hw turned in to TAs (Jesus or Danny) HW #2, due Tuesday, April 14th, in class. Check your e-mail, or download from
School: UCLA
3/1/2015 What have we learned? Challenges for Habitability The vastness of Space What have we learned? ~400billionstarsinourgalaxyalone. StaroftypesG(7%),K(15%)andM (75%)=97%ofallstarsinthegalaxy. OurexistenceprovesthatGstarscan havehabitablezones. Ke
School: UCLA
Getting to space defying gravity The Rocket Equation: v = ve ln (M ) M i Example: to get 2,000 lbs into orbit you need 22,000 lbs of fuel, and a rocket that gives 4.5 km/s exhaust velocity. f Interstellar Space Travel The challenge A scene from AVATAR as
School: UCLA
2/21/2015 Characterization of Exoplanets Launched: March 7, 2009. Keplerobservestransits,which yieldstheradius oftheexoplanet andthereforethedensitywhen weknowthemassfromDoppler velocitymeasurements. Kepler 11 artists impression Exoplanet Statistics 1,03
School: UCLA
Whats going on? 51 Peg: the rhythmic wobble in the spectrum gave an orbital speed of 57 meters per second. The repetitive 4-day period of the stars motion tells us the orbital period of its planet. With a period of 4 days, this planet is really close to
School: UCLA
1/18/2015 Development of our Space Program REQUIREMENTS FOR TERRESTRIAL LIFE PHYSICAL AND CHEMICAL LIQUID WATER TEMPERATURE AND PRESSURE CONSTRAINTS PROTECTION OZONE FOR UV, MAGNETIC FIELD FOR SOLAR WIND ELEMENTS C, H, O, AND N, 96% OF LIVING ORGANISMS;
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Professor Alice Shapley Lecture 4: Light & Thermal Radiation (Ch. 5) Announcements Late hw turned in to TAs (Xinnan, Sam, or Ashwin). HW #2, due Tuesday, October 15th, in class. Check your e-mail, or dow
School: UCLA
Course: NATURE OF THE UNIVERSE
Lecture 4: Oct 8th NatureoftheUniverse anoteonlanguage scientistsusemanywordswithveryspecificmeanings ex:energy,momentum,mass,etc. Physics scienceofunderstandingtheuniverseatafundamentallevel,whyandhowthingsmove physicsallowsutomakesenseofastronomy physic
School: UCLA
Course: NATURE OF THE UNIVERSE
Lecture 1 Sept 26 Heliocentricmodels Existedtheclassicalworldbutwithverylimitedsupport Centrimodels Earthnolongerthecenteroftheuniverse. Earthisinmotion Modelwasn'tperfectbutmoreaccurate Themodernuniverse Overviewoftheuniverse Earth meanradius:6371km mass
School: UCLA
Course: NATURE OF THE UNIVERSE
Astronomy 3 Section 1 Fall 2013 Lecture 7 10/17/13 Exam Next Week! Tuesday, October 22 nd Normal class time and room. Use only #2 pencils for filling in your Scantron form! A calculator is permitted but not needed. No cell phones, computers, tablets, or o
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astro 4 Final Review HR diagram o If star is moving horizontally: o How long before sun exhausts fuel o Its getting cooler, expanding (redder) 5 billion years Ex. R = 166Rsun, T = 3100k; whats luminosity? L/Lsun = R/Rsun2 T/Tsun4 = 1662 * 3100/58004 = 220
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture135/12/15 Howtodetect o LNS/Lsun=RNS/Rsun2xTNS/Tsun4 Pulsars:evidencethatNSexists o o Radiopulsesatregularintervalsbetween0.001to10sec o Spectrumoftimevsintensity o Eachpulsarwouldhaveapulseprofile o Sourcesofradiowaves AnotherpulsardiscoveredinCra
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture3 NewHWuponline Showallworkforfullcredit Reviewfromlattime o o Mass,momentum,angularmomentum,force o Newtonslaws o Uniformscircularmotion,centripetalacc o Energy:kinetic(motion,temp),potential(stored) o Vectors,motion Conservationofmomentum,angular
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture8 Apparentbrightnessorflux=Aswegetfartheraway,theSAgetsbiggerandtheapparent brightnesslessens o Flux=L/(4pid2) Units=watts/m2 MassesofSatrs o Massdetermines o Starsluminosity Starsspectraltype(ietemp) Measureddirectlyby Observingtheeffectwhichgravi
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture6 BasicPropertiesoftheSun o o Densityofaboutwater CompositionmainlyH(70%),He(28%) Layers o Core o Radiation o Convection o SolarAtmosphere Photosphere Radiationsmostofsunsenergywhatweseeinvisiblelight Chromosphere Corona o Hotandtenuous SolarWind S
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture5 Pickupgradedhwin1707P&Abuilding Review o Spectra:continous,absorption,emission o Infocarriedbyyspectra:temperature,composition,velocity o TemperatureThermal/blackradiation: F(brightness)=T^4 Hotterobjectsarebluer,peaksearlier RulesforEmissionbyOp
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture1 OfficeHours:3326PhysicsandAstronomyBuilding ReadthetrippyessayonpxxvbyNeildeGrasseTyson Overview o o Stars,stellarevolutionandtheirdeaths,blackholes o SupermassiveblackholesandgravityinourGalaxyandothers o Introtobasicphysicalandastronomicalconce
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture2 HW#1duenextTuesday 2258A Reviewfocuspoints o Astronomicterms,scientificnotation,scaleoftheuniverse(km,AU,ly)andourlocation WhyPhysicsFundamentals o o TheMiceInteractingGalaxies,CrabSupernova,CygnusX1Xbinarystar Wheresenergycomingfrom?Whyismateria
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture4 Review o Lawofgravitation o Gravitationalacc,g o Orbitofthemoon o FgvsFcentripetal o EscapeVelocity o GravitationalPEandconservationofenergy LightandMatter Fourwaysinwhichlightcaninteractwithmatter o o 2.Absorptionmattertakesenergyfromlight(eyeba
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture7 Luminosity o Totalenergyemittedpersecond(J/s) o Doesntdependondistancebutratheritsintrinsicquality o Apparentbrightness(flux)canalwaysbemeasuredaslongaswecanseeit o Infowereceivefromtheobjectanddependsonluminosityanddistance(not intrinsic) Lumino
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture185/28/15 Shapely o Edgeonviewofgalaxy o Sunis28,000lyfromcenter Downwardviewofgalaxy o ArguedthatglobularclusterstracedthestructureofGalaxyandusedtheirdistributionto findoutthatsunwasnotcenterofGalaxy Wecanseespiralarms Milkywayisseendifferentlyat
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture104/30/15 Position/ageofhotteststartellsage Stellarevolution o Astarsmassdetermineslifepath o Massdeterminescoretemp Hottercore=higherrateoffusion,differentfussionreaction 3groupsofmasses Intermediate:28 Low:0.082Solarmasses High:>8 Howstarsform? o
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture155/19/15 Massofblackholeonmainsequencehastobebiggerthancompanionstarbecauseitdiedearlier TheoriesofRelativity o Specialrelationshipofspaceandtime,nogravity o Generaleffectsofgravityonspaceandtime Encounteredwhennearmassiveobjects SpecialRelativity
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture165/21/15 GravitationalTimeDilation o Ifyourefarawayfromblackhole,thetimeintervalsareaaboutthesame BlackHolesandGravitationalRedshifts BlackHolesandSpacetime o StretchingofspacetimeneareventhorizonmeanstimepassesmoreSLOWLYthecloser youaretotheBH Se
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture175/26/15 Shapesandspectraarerelated o Spectraofellipticalgalaxyhasmore o Spiralspectra=allstarsandGASES Hasactivestarformationgoingon Seyfert1BROADHlinesandnarrowerOxygenlines Seyfert2strongemissionlinesarenotasbroad RadioGalaxies o o Ex.Centaurus
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture125/7/15 WhiteDwarfStructure o Havedifferentpressure o Moremass=smallerradius o Greaterdensityincreasesdegeneracypressuretobalancegravity o Increasedgravitymakesthestardenser SoelectronsgetforcedintohigherenergystateswhichmeansHIGHER velocities Ist
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture145/14/15 NS o WD o Max1.4Solarmasses BlackHoles o Thereisminandmaxsize Evenlightiswarpedduetogravitationalpull DoBlackHolesExist? o BHemitnolight o AslongasstufffarfromSchwarzschildradius,blackbehaveslikeregularNewtonian massedobject o Ex.earthorb
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Lecture115/5/15 Spectrafromneutralatomscomparedwithspectrafromionizedatomsofthesameelementhave differentsetsofspectrallines Pressurevsgravity o Catseyenebula o Idealgasdominatedbypressure,motionofmolecules Strongemission,discretelinesfromnumerousmolecules
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Winter 2015 April 16, 2015 Session 3 - Light and stars Though my soul may set in darkness, it will rise in perfect light; I have loved the stars too fondly to be fearful of the night. Sarah Williams. Remember my oce hours are posted in CCLE
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 May 14, 2015 Session 8 - Black holes and Relativity II The most beautiful thing we can experience is the mysterious. It is the source of all true art and all science. Albert Einstein. Remember my oce hours are posted in CCLE . Vi
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 May 7, 2015 Session 5 - Stellar evolution (Part II) High mass stars and stellar remnants When a star goes supernova, the explosion emits enough light to overshadow an entire solar system, even a galaxy. Such explosions can set o t
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 April 2, 2015 Session 1 - Math and Physics Review Do not worry about your diculties in Mathematics. I can assure you mine are still greater. Albert Einstein. My oce hours are posted in CCLE . Today we will review some math concep
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 April 23, 2015 Session 4 - Stars The sky calls to us. If we do not destroy ourselves, we will one day venture to the stars. Carl Sagan. Remember my oce hours are posted in CCLE . Before we begin, here is the astronomy picture of
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 May 14, 2015 Session 7 - Black holes and Relativity Everything should be as simple as possible, but not simpler. Albert Einstein. Remember my oce hours are posted in CCLE . Next week, May 20, I will give a planetarium show. You s
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Winter 2015 April 9, 2015 Session 2 - Gravity and Light The most incomprehensible thing about the universe is that it is comprehensible. Albert Einstein Remember my oce hours are Mondays and Wednesdays 5-6 pm, PAB 1-704A (Tutoring center), or
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 May 28, 2015 Session 9 - Galaxies and AGNs We on Earth marvel, and rightfully so, at the daily return of our single sun. But from a planet orbiting a star in a distant globular cluster, a still more glorious dawn awaits. Not a sun
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 April 30, 2015 Session 5 - Stellar evolution Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world. Harriet Tubman. Re
School: UCLA
Course: ASTRONOMY 3
ASTRO 3 MIDTERM 1 CH1: A Modern View of the Universe Our Cosmic address: Universe>Local Supercluster> Local group> Milky Way Galaxy> Solar System> Earth Solar System: The sun and all the other material that orbits it, including planets, dwarf planets, and
School: UCLA
Asteroid Leftoverfromsolarnubuler Rawmaterialneverformedaplanet Onearth,allmaterialsareprocessed Nomaterialonearthrememberwhenearthwasformed Timecastles,earliestmomentssolarsystemhistory,infolostfromplanets Question:howdoyougetthem? Majority:dontinfoabout
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Astro5week6 Earth 1. 2. 3. 4. 5. 6. 7. rightdistance magneticfield hasamoon:tidal hasCO2cycleduetoplatetectonics eukyratesevolutionwasntnecessary Jupiterisnearby,protectsusfromdeadlyasteroidimpacts KTimpactpavedthewayforhumanstoruletheearth:insecteatingma
School: UCLA
Course: Astro 5
1. Brian Friel has claimed that his play Translations has to do with language and only with language. Discuss this claim with reference to both overarching themes and specific moments in the text. My take on his statement Friels claim is partially true th
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Professor Alice Shapley Lecture 4: Light & Thermal Radiation (Ch. 5) Announcements Late hw turned in to TAs (Jesus or Danny) HW #2, due Tuesday, April 14th, in class. Check your e-mail, or download from
School: UCLA
3/1/2015 What have we learned? Challenges for Habitability The vastness of Space What have we learned? ~400billionstarsinourgalaxyalone. StaroftypesG(7%),K(15%)andM (75%)=97%ofallstarsinthegalaxy. OurexistenceprovesthatGstarscan havehabitablezones. Ke
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Getting to space defying gravity The Rocket Equation: v = ve ln (M ) M i Example: to get 2,000 lbs into orbit you need 22,000 lbs of fuel, and a rocket that gives 4.5 km/s exhaust velocity. f Interstellar Space Travel The challenge A scene from AVATAR as
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2/21/2015 Characterization of Exoplanets Launched: March 7, 2009. Keplerobservestransits,which yieldstheradius oftheexoplanet andthereforethedensitywhen weknowthemassfromDoppler velocitymeasurements. Kepler 11 artists impression Exoplanet Statistics 1,03
School: UCLA
Whats going on? 51 Peg: the rhythmic wobble in the spectrum gave an orbital speed of 57 meters per second. The repetitive 4-day period of the stars motion tells us the orbital period of its planet. With a period of 4 days, this planet is really close to
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Stars and Stellar Evolution Star and Stellar Evolution Stars are giant, balls of hydrogen/helium gas at very high temperatures. Stars are held together by their own gravity. The temperature at the center of a star is very high, so spontaneous thermal n
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Telescopes and Observable Signatures The search for worlds around other stars The Challenge Other stars are very far away! Remember our 10 billion to one scale model? Sun = size of grapefruit; Earth is like the tip of a ball point pen placed 15 m (50 f
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Stellar life cycles and habitability All stars have life cycles. Habitability Outside the Solar System Discovery of Exoplanets Lets review the life cycles of stars and their impact on habitability. Starts with the gravitational collapse of a giant cloud
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2/16/2015 Rare Earth Hypothesis and the Fermi Paradox Is Earth Rare? MANY things had to go right for life to exist on Earth. Are we alone in the Universe? Our Sun is the right distance from the center of the galaxy too close, and youre blasted with radiat
School: UCLA
https:/ccle.ucla.edu/course/view/15W-ASTR5-1 REMINDER ASTRONOMY 5 Life in the Universe Professor Ian McLean Office: Physics & Astronomy Building (PAB) 3-939 Office Hours: 3-5 pm Tue/Thu mclean@astro.ucla.edu Teaching Assistant: Alec Vinson Text Book: Life
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The Nature and Evolution of Habitability Our quest is a search for Life in the Universe. So far we have explored the solar system, and so far we are certain of life on only one planet Earth. Before we look to the stars, lets review what we have learned a
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Why did Mars change? Search for Life Elsewhere Mars and the Jovian moons Mars once had flowing water, and a thicker and warmer atmosphere of CO2 (a greenhouse gas). Mars now appears to have a sterile surface due to UV radiation from the Sun; hence the p
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Search for Life Elsewhere Venera 13 on Venus VENUS One day on Venus lasts as long as 243 Earth days (this is the time it takes for Venus to rotate or spin once). And Venus spins backwards! Venus makes a complete orbit around the Sun (a year in Venusian
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The Origin and Evolution of Life on Earth Stromatolites Stromatolites are rocks characterized by a distinctive, layered structure. In size, shape and interior structure, ancient stromatolites look virtually identical to sections of mats formed today by
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Defining Life Nature of Life on Earth The Cat and the Car Consider a cat and car! Both require energy to function The cat gets energy from food The car gets energy from gasoline Both can move at varying speeds and turn corners Both expel waste produ
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1/11/2015 Geology and Life It is easy to take for granted the qualities that make Earth suitable for life The Habitability of Earth The Terrestrial Worlds Mercury craters smooth plains, cliffs Venus Mars Earth volcanoes few craters some craters volcanoes
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1/18/2015 Development of our Space Program REQUIREMENTS FOR TERRESTRIAL LIFE PHYSICAL AND CHEMICAL LIQUID WATER TEMPERATURE AND PRESSURE CONSTRAINTS PROTECTION OZONE FOR UV, MAGNETIC FIELD FOR SOLAR WIND ELEMENTS C, H, O, AND N, 96% OF LIVING ORGANISMS;
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Professor Alice Shapley Lecture 4: Light & Thermal Radiation (Ch. 5) Announcements Late hw turned in to TAs (Xinnan, Sam, or Ashwin). HW #2, due Tuesday, October 15th, in class. Check your e-mail, or dow
School: UCLA
Course: NATURE OF THE UNIVERSE
Galilean moons of Jupiter Io Europa Ganymede Callisto Galileo spacecraft Io: youngest surface in the solar system hot interior: tidal heating, active volcanos visible changes in Ios surface over a few months Galileo spacecraft Europa: an ice-covered ocean
School: UCLA
Course: NATURE OF THE UNIVERSE
why does the sun shine? mviles apagados pf the sun today chapter 9 THE SUN visible magnetogram what is the solar cycle? 22 yrs, complete cycle. proxy for activity: sunspots 1) every 11 yrs number of sunspots peaks SOLAR MAXIMUM 2) at solar maximum, sun em
School: UCLA
Course: NATURE OF THE UNIVERSE
Curiosity Rover from Mars, NASA/JPL chapter 5 THE EARTH & ITS MOON Galileo spacecraft, NASA/JPL Chesapeake impact crater slumping of crust over crater 5-7 subsidence/century recent climate trends currently: mean T = 288K max 330K, min 184K noaa.gov proble
School: UCLA
Course: NATURE OF THE UNIVERSE
our moon mass = 1/81 Me radius = 0.3 Re mean density = 3.3 g/cc albedo = 7% (earth: 37%) photojournal.jpl.nasa.gov/target/moon our moon mass = 1/81 Me radius = 0.3 Re mean density = 3.3 g/cc albedo = 7% (earth: 37%) maria: seas dark, younger (3.2-3.9) hig
School: UCLA
Course: NATURE OF THE UNIVERSE
Big Dipper and little Dipper, asterisms in Ursa Major and Ursa Miinor J. Lodriguss APOD 4/21/13 XMM telescope, ESA APOD chapters 2.1-2.3, 3 LIGHT, WAVES, &TELESCOPES wavelengths not in the visible or radio windows to observe at wavelengths in which the at
School: UCLA
Course: NATURE OF THE UNIVERSE
chapter 2: 2.4-2.8 STELLAR SPECTRA Kirchhoffs laws for spectra 1. continuous 2. bright line 3. dark line spectra ircamera.as.arizona.edu line spectra come from atoms & molecules periodic table atomic number = number of protons (also # of electrons) atomic
School: UCLA
Course: NATURE OF THE UNIVERSE
AR1944 sunspot group responsible for Northern Lights apod 1/9/14 Astronomy Open House, telescope viewing & planetarium show every Wednesday during the quarter, when skies are clear planetarium show 7-8 pm (depends on time of year) telescope viewing after
School: UCLA
Course: NATURE OF THE UNIVERSE
Lecture 3: Oct 3 Planetarymotion 1800s,mercury,earth,mars,jupiter,saturnwereonlytheonlyplanetsthatwereknownof. Theydidn'tknowtheabsolutedistancetotheplanets.Theytriedestimatingthesethings. Theknowledgeoftheuniversewasbasedontheobservationsthatthey made.
School: UCLA
Course: NATURE OF THE UNIVERSE
Lecture 5: newtonslaw'sofuniversalgravitation boundandunboundorbits gravityandtides tidallocking light&matter
School: UCLA
Course: NATURE OF THE UNIVERSE
ANSWER KEY ASTRONOMY 3 Prof. McLean Dept. Physics & Astronomy UCLA Mid-Term 1 January 25, 2011 Read these Instructions Please bubble-in your name and student ID number on the Scantron. If you do not, there will be no record that you took this exam! Read t
School: UCLA
Course: Astro 5
Astronomy 5 Midterm Monday, October 31, 2011, 2:003:15 PM Name: _ (enter it also on the scantron) Part I: Multiple Choice Use the scantron to answer the questions from this section. In each case, choos
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Final Study Guide Below, you will nd a series of questions based on the lectures from the second half of the course. This list is by no means exhaustive, but represents a large chunk of what is important for the course. Remember, this test is
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Name: UID: Astronomy 4 Midterm Exam, Version A Tuesday, April 28th, 11:00 a.m. 12:15 p.m. DO NOT OPEN THIS EXAM UNTIL TOLD TO DO SO WHILE YOU ARE WAITING This exam is closed book. Calculators are allowed, but any quantitative problems have been set up so
School: UCLA
Preparation for Final Wednesday, March 18, from 11:30am-2:30pm Two Groups, two rooms: PLEASE NOTE Last Name A L : KNSY PV 1220B at 11:30am Last Name M Z : KNSY PV 1240B at 11:45am Please go to the correct room Multiple Choice Exam; I will provide Scantron
School: UCLA
Preparation for Midterm Thursday, February 5, in class starts at 9am Multiple Choice; I will provide Scantrons bring your own pencils and erasers. Test includes all material up through Jan 29. Review all Homework sets; be sure you know the correct ans
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Key Topics for the Midterm Scientific Method and Hallmarks of Science 1. Seek explanations relying solely on natural causes 2. Occams Razor create and test models that explain observations as simply as possible 3. Models must be able to make predictions a
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Final review Habitable zone How it depends on luminosity of the star Evolution of habitable zone Galactic habitable zone Too much activities if too close to the center (supernova, black hole) If too fringe: no heavy elements (eg. carbon) Telescope and lig
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Astronomy 5 Midterm 2 Study Guide Extremophiles Life on Earth o Life: carbon based (biomolecules) Water is essential o Cell: Prokaryotic and Eukaryotic o DNA: genes contain heredity and codon information o Transcription to translation: elaborate and compl
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Final Study Guide Life in the Solar System Environmental requirements for life o Requirements for terrestrial life: Physical and chemical Liquid water acts as the constraints for temperature and pressure Protection: Ozone atmosphere protects surface fr
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Condensation and accretion o New dust forms from minerals where temperature is below 103 K o Grains become condensation nuclei for clumps Grow by sweeping up material Clumps collide and stick together, growing and accreting to from planetesimals o Rocky
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Name: UID: Astronomy 4 Midterm Exam, Version A Solution Set Thursday, October 24th, 9:30 a.m. 10:45 a.m. DO NOT OPEN THIS EXAM UNTIL TOLD TO DO SO WHILE YOU ARE WAITING This exam is closed book. Calculators are allowed, but any quantitative problems have
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Final Cheat Sheet Constants kB = 1.38 1023 Joules K1 h = 6.63 1034 Joules sec c = 3.00 108 m sec1 G = 6.67 1011 m3 kg1 sec2 = 5.67 108 Joules sec1 m2 K4 1 eV = 1.60 1019 Joules 1 A.U. = 1.496 1011 m 1 L.Y. = 9.46 1015 m 1 pc = 206265 AU = 3.0
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Final Study Guide Below, you will nd a series of questions based on the lectures from the second half of the course. This list is by no means exhaustive, but represents a large chunk of what is important for the course. Remember, this test is
School: UCLA
Course: Astro 5
Study Questions for the Astronomy 5 Midterm 1. What is the storage mechanism for readily available energy in all biological organisms, and what must the cell do to tap into that energy? What is another energy storage mechanism for most complex animals? (W
School: UCLA
Course: Astro 5
Physics 6A Practice Midterm #1 1. You drive your car at a speed of 40 km/hr for 1 hour, then slow down to 30 km/hr for the next 20 km. How far did you drive, and what was your average speed? a) 60 km at 35 km/hr b) 60 km at 36 km/hr c) 65 km at 38 km/hr d
School: UCLA
Course: Astro 5
Sample Problems for Midterm 1 3 1. Approximate 2. Use the geometric interpretation of the integral to evaluate the following integrals: 2 (a) 0 (b) 3. 3 1 1 x4 dx by a Riemann sum, using midpoints and a partition of 5 equal subintervals. 5x + 1 dx 1 (x 2)
School: UCLA
Course: Astro 5
Sample Problems for Midterm 1 1. Approximate 3 1 x4 dx by a Riemann sum, using midpoints and a partition of 5 equal subintervals. We rst partition the interval [1, 3] into 5 equal subintervals. All of these intervals should have equal length l and the sum
School: UCLA
Course: Astro 5
PmC ~ \ rsdodwoms ave mom Verb ye +KCQ HQ SCH/HOWE Wamjouwdhbeonj/uexab ® WefzJvfh/J/ f0 mwawL i+ [Met/m: We cum/2H0 01pm dam/awe JEOMIyQ/Ig gummablw 6&1 W-ouamx A: Zrqp 76; Wk (9 c 27% mad Wm 2! + r2441 (10) (WSW/2014mm j/IP/¢O/ g 45 , .._2 2A _
School: UCLA
Course: Astro 5
Practice Final Math 3A Daniel Murfet March 7, 2011 The nal exam is 3 hours long, and will have approximately 12 questions. There will be an emphasis on the material covered after the second midterm: roughly, 3 questions about the material from before the
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 Homework 6 - solutions Problem 1 a) Use the formula for the Schwarzschild radius, Rsch = 2GM M Km = 3(1) Km = 3Km =3 2 c M In comparison with a normal White Dwarf, R = 0.01R 7000 Km The White Dwarf is 7000 Km = 2333 times bigger 3
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #7 Solutions Spring 2015 1. Gravitational Redshift (a) The spaceship is at r = 2RS , so using the gravitational redshift formula the frequency as observed by Earth will be smaller (because time is dilated near the black hole): 1 = 0.707 mi
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #5 Solutions Spring 2015 1. Properties of giant stars (a) The escape velocity of an object at a distance r from an object of mass M is given by vesc = 2GM/r. Applied to the surface of the Sun (using M = M = 2 1030 kg and R = R = 7 108 m).
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #1 Solutions Spring 2015 1. Workout with Scientic Notation and Units (a) 0.00000000000537 = 5.37 1012 (b) 26400000000000000 = 2.64 1016 (c) Using the conversion factor 1 AU = 1.5 1011 m: 7.0 1016 m 1 AU = 4.67 105 AU 1.5 1011 m (d) First
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #3 Solutions Spring 2015 1. Magnesium Energy Levels (a) The conversion factor is 1 eV = 1.602 1019 J, so 4.3458 eV 1.6 1019 J = 6.96 1019 J 1 eV (b) The photons energy will be exactly equal to the energy dierence between level 3 and 1, E
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Winter 2015 Homework 2 - solutions Problem 1 a) The acceleration of gravity is given by g= GM r2 Using G = 6.67 1011 m3 kg 1 s2 , M = 6 1024 Kg, and r = 6371000 m + 390000 m = 6.761 106 m, we get g = 8.75 m/s2 . b) The escape velocity is give
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4, Spring 2015 Homework 4 - solutions Problem 1 a) Remember that parallax is one over the distance. So if a star has 4 times the parallax of another, it means that it is 4 times closer. In symbols: We know that, A = 4B Remember that d[pc] = 1 [a
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #1 Due date: Tuesday, April 7th 1. Workout with Scientic Notation and Units (a) Express 0.00000000000537 in scientic notation. (b) Express 26400000000000000 in scientic notation. (c) Express 7.0 1016 m in terms of astronomical units (AU).
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #2 Due date: Tuesday, April 14th 1. Gravity and the International Space Station The International Space Station orbits the Earth at an altitude of 390 km. (a) What is the acceleration of gravity (in m/s2 ) at this altitude. Remember: at th
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #3 Due date: Tuesday, April 21st 1. Magnesium Energy Levels The magnesium atom has specic energy levels, which correspond to dierent arrangements of the electrons around the nucleus. As an electron moves between the dierent energy levels o
School: UCLA
Course: Black Holes And Cosmic Catastrophes
1) A. We find that the peak wavelength of a white dwarfs spectrum is 150 nm, what is the surface temperature of said white dwarf? Answer: We have a peak wavelength of a spectrum and we want temperature. Well use Wiens Law. . Note: Whether you use mm, nm,
School: UCLA
Course: Black Holes And Cosmic Catastrophes
HW #7 Solutions 1. Spaceship around a BH, at r = 1.2Rs, sends signal once every minute with = 450 nm to distance far away, where gravity from BH is negligible. a. What rate is the signal observed to have at the distance far from BH, that is, at the distan
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astro 4 Homework #1 Solutions 1) Workout with Scientific Notation and Units A. Express 0.00000000000182 in scientific notation. Answer: 1.82 10-12 B. Express 263000000000000000 in scientific notation. Answer: 2.63 1017 C. Express 6.0 1014 km in terms of a
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #8 Due date: Tuesday, December 3rd 1. Weighing the Milky Way (a) Based on the circular orbits of stars at the edge of the luminous component of the Milky Way disk, we can calculate how much mass is contained within their orbits. These star
School: UCLA
Course: Black Holes And Cosmic Catastrophes
HW #6 Solutions 1(a) Whats the upper limit on the size of the source? Since the size of the source cannot be larger than the distance light can travel during the burst, R = ct = 3 108 m/s 2 103 s = 6 105 m = 600km (b) List two possible astronomical object
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #7 Due date: Tuesday, November 26th 1. Gravitational Redshift Consider a spaceship in orbit around a black hole. The spaceship is located at a radius of r = 1.2RS , where RS is the Schwarzschild radius of the black hole. To communicate wit
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #6 Due date: Tuesday, November 19th 1. X-ray Binary Sytems Consider the hypothetical X-ray binary system Imaginary-X-1. This system consists of a main sequence B star and an unseen companion surrounded by a hot accretion disk emitting in X
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astro 4: HW #5 Solutions 1. Stellar Motions Radial velocity : The observed wavelength is the Doppler shifted wavelength. obs rest v rest c rest 393.366nm, obs 393.308nm, c 3 108 ms1 v 4.42 104ms1 The observed wavelength is lesser than the rest wavelength
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #5 Due date: Tuesday, November 12th 1. Stellar Motions While at the telescope, an astronomer collects the spectrum of a nearby star, which is very similar to that of our Sun. As such, some of the strongest features in the spectrum come fro
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 HW #3 1. (a) How many kilograms of hydrogen does the Sun fuse every second? From the proton-proton chain, we know that 4 1H 4He, where the energy loss is 0.03mp c 2 for every four hydrogen atoms. So the efficiency is: = 4m c2 = 4 = 0.007. p E
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #4 Due date: Tuesday, November 5th 1. Properties of White Dwarfs (a) An astronomer obtains the spectrum of a white dwarf star, and determines that it peaks in the ultraviolet at = 150 nm, similar to the spectra of very luminous main-sequen
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #3 Due date: Tuesday, October 22nd 1. Hydrogen Fusion in the Sun (a) The solar luminosity is the amount of energy emitted by the Sun per unit time. Based on the solar luminosity, how many kilograms of hydrogen does the Sun fuse every secon
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astro 4: HW #2 Solutions 1. Gravitational Force in the Solar System (a) Write down the expression for the gravitational force between the Sun and the planet Jupiter, neglecting the gravitational eects of other planets. F = GMSun MJupiter d2 Jupiter (b) Ap
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #2 Due date: Tuesday, October 15th 1. Gravitational Force in the Solar System (a) Write down the expression for the gravitational force between the Sun and the planet Jupiter, neglecting the gravitational eects of other planets. Express yo
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: HW #1 Due date: Tuesday, October 8th 1. Workout with Scientic Notation and Units (a) Express 0.00000000000182 in scientic notation. (b) Express 263000000000000000 in scientic notation. (c) Express 6.0 1014 km in terms of astronomical units (A
School: UCLA
Course: Astro 5
Vectors, Kinematics in 2D G3.6. Vector is 6.0 units long and points along the negative units long and points at to the positive axis. (a) What are the x and y components of each vector? (b) Determine the sum Solution: cos sin axis. Vector is 4.5 sin cos c
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Study Guide Below, you will nd a series of questions based on the lectures preceding the midterm exam. This list is by no means exhaustive, but represents a large chunk of what is important for the course so far. If you have questions
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Study Guide Below, you will nd a series of questions based on the lectures preceding the midterm exam. This list is by no means exhaustive, but represents a large chunk of what is important for the course so far. If you have questions
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4 Midterm Cheat Sheet Constants kB = 1.38 1023 Joules K1 h = 6.63 1034 Joules sec c = 3.00 108 m sec1 G = 6.67 1011 m3 kg1 sec2 = 5.67 108 Joules sec1 m2 K4 1 eV = 1.60 1019 Joules M (Sun) = 1.99 1030 kg M (Earth) = 5.97 1024 kg M (Jupiter) = 1
School: UCLA
Course: Life In The Universe
Midterm Review 58 MC Questions Jupiter 6 questions Earth formation and other planet formations (planetesmals) 1 question Extra Solar Planets 9 questions Supernova explosions 1 question Center of mass 2 questions 1. the center of mass in the solar system i
School: UCLA
Course: NATURE OF THE UNIVERSE
V1.0 Nature of Universe (Astronomy 3) PAB 1425 TR 11AM-12:15PM Instructor Class S. A. Isaac Mognet Department of Physics and Astronomy Oce: 3-546 PAB Oce Hours: E-mail: mognet@astro.ucla.edu Phone: (310) 794-9455 TBD Other times by Appointment Astronomy 3
School: UCLA
ASTRONOMY 5 LIFE IN THE UNIVERSE Fall, 2014 Instructor: F. V. Coroniti Office: Phone: (310) 825-3923 E-Mail: Coroniti@astro.ucla.edu Text: Custom Edition for Astronomy 5 UCLA - Pearson; taken from: Office Hrs: PAB 3-919 Monday 9 - 10 Am Friday 1- 2 Pm By
School: UCLA
Course: Black Holes And Cosmic Catastrophes
Astronomy 4: Black Holes and Cosmic Catastrophes Fall 2013 Lectures: TTh 9:30 am - 10:45 am, Kinsey Pavilion 1240B Discussion Section 1A: Th 2:00-2:50 pm, 2200 Young Hall, TA: Xinnan Du Discussion Section 1B: Th 3:00-3:50 pm, 5137 Math Sciences, TA: Ashwi
School: UCLA
Course: Astro 5
Psychology 10: Introduction to Psychology Young CS76, Tues/Thurs 8:00-9:50AM Instructors Weeks 1-7 W. David Stahlman, Ph.D. Office: Franz 8425B Office Hours: Wednesday 8-10:00am and by appointment E-mail: wstahlma@ucla.edu Weeks 8-10 Jennifer Shultz, Ph.D
School: UCLA
ASTR 3, LEC 1: Nature of the Universe MWF 12:00 pm -12:50 pm in Math Sciences 4000A SRS# 123 009 200 Professor Ian S. McLean Office PAB 3-939: mclean@astro.ucla.edu Office Hours: 3-5 pm Tu/Th Book: The Essential Cosmic Perspective, 5th ed. (loose leaf is