lect44
5 Pages

lect44

Course Number: ASTRO 311, Fall 2009

College/University: Wisc Stevens Point

Word Count: 140

Rating:

Document Preview

Lecture 42 Hubble Law Hubble's Law for Galaxies Velocities measured Doppler shift Nearly all galaxies and clusters are moving away from us (red-shifted) Distances measured Cepheid variables Tully-Fisher relation Hubble's Law = The greater the recessional velocity (redshift), the larger the distance Not theoretical idea, but observational fact Velocity (km/s) = H O Distance (Mpc) Where H O 75...

Unformatted Document Excerpt
Coursehero >> Wisconsin >> Wisc Stevens Point >> ASTRO 311

Course Hero has millions of student submitted documents similar to the one
below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

Course Hero has millions of student submitted documents similar to the one below including study guides, practice problems, reference materials, practice exams, textbook help and tutor support.

42 Lecture Hubble Law Hubble's Law for Galaxies Velocities measured Doppler shift Nearly all galaxies and clusters are moving away from us (red-shifted) Distances measured Cepheid variables Tully-Fisher relation Hubble's Law = The greater the recessional velocity (redshift), the larger the distance Not theoretical idea, but observational fact Velocity (km/s) = H O Distance (Mpc) Where H O 75 km/sec/Mpc = " Hubble' s Constant" Example: every For 1 Mpc in distance, a galaxy is receding by 75 km/s. Hubble's Law and Distances Hubble's law allows us to measure distance to very distant galaxies. If HO is known and velocity measured via Doppler shift of spectral lines, the distance can be estimated. The Hubbl...

Find millions of documents on Course Hero - Study Guides, Lecture Notes, Reference Materials, Practice Exams and more. Course Hero has millions of course specific materials providing students with the best way to expand their education.

Below is a small sample set of documents:

SUNY Stony Brook - MAT - 125
Math 125Name:Second Midterm (modified)March 20, 2007ID:Rec:Question: Points: Score:1 162 123 144 105 106 137 108 14Total 99There are 8 problems in this exam, printed on 7 pages (not including this cover sheet). Make sure
SUNY Stony Brook - MAT - 118
Quiz 2MAT 118, Spring 2003circle your section 2 Tues 11:20 3 Thur 12:50 4 Tues 5:30PRINT your Name:1. The participants in a meeting are trying to decide what breakfast snack to have along with the coffee and tea at the morning break. After bic
SUNY Stony Brook - MAT - 125
Second Midterm ExamName:ELC3 R05 R10 R16 Josh Daniel Yoav Ari MW 6:50p M 11:45a W 9:35a Th 2:20p R01 R06 R11 R17 Yoav Samir Daniel Daniel M 9:35a Th 2:20p W 11:45a M 5:20p R02 R07 R12 R19 Samir Wenchuan Dezhen DezhenMAT 125, Fall 2004ID#:Th 12:
Allan Hancock College - CS - 4415
COMP4415 Lecture Notes on Logic ProgrammingMichael Maher May 18, 20091Non-monotonicityq then P QClassical logic is monotonic in the following sense: if P qIn other words, from more formulas we can only infer more things nothing becomes un
Washington - AAS - 372
UNC - DOCS - 2684
*The Project Gutenberg Etext of Five Tales, by John Galsworthy*#9 in our series by John GalsworthyCopyright laws are changing all over the world, be sure to checkthe copyright laws for your country before posting these files!Please take a look
UNC - DOCS - 2684
The Project Gutenberg EBook of Five Tales, by John GalsworthyThis eBook is for the use of anyone anywhere at no cost and withalmost no restrictions whatsoever. You may copy it, give it away orre-use it under the terms of the Project Gutenberg Li
Rutgers - HONORS - 259
Honors Seminar 259 - cheat sheet for 12/3/2008 - Andrew BakerBarton & Harvey (2000) You should read all of the whole article except for the "Methods" section. Key questions: 1. What does "mosaic evolution" mean in the context of this article? 2. Wha
N.C. State - MAE - 316
NAME:_MAE 316 Strength of Mechanical Components NC State UniversityDUE: Mon June 9 Homework #3Summer I Semester 20081.) A simply supported beam has a moment of inertia 1.5I from A to B and I from B to C. A concentrated force acts at B. Using
N.C. State - MAE - 316
NAME:_MAE 316-002 Strength of Mechanical Components NC State UniversityDUE: Tues Feb 19 Homework #3Spring Semester 20081.) A simply supported beam has a moment of inertia 1.5I from A to B and I from B to C. A concentrated force acts at B. Usi
Stanford - EE - 479
Contents5 Generalized Decision Feedback Equalization 5.1 Information Theoretic Approach to Decision Feedback . . . . . . . . . . . . . . . 5.1.1 MMSE Estimation and Conditional Entropy . . . . . . . . . . . . . . . . 5.1.2 The relationship of the MM
Stanford - EE - 479
Contents13 The Gaussian Vector Multiple Access Channel 13.1 The Gaussian Vector MAC Model . . . . . . . . . . . . . . . . . . 13.1.1 Vector Model Basics . . . . . . . . . . . . . . . . . . . . . . 13.1.2 The SWF rate-sum criterion for the Gaussian V
Stanford - EE - 479
Contents14 The Gaussian Vector Broadcast Channel 14.1 The Vector Broadcast Channel . . . . . . . . . . . 14.1.1 Modeling the BC . . . . . . . . . . . . . . 14.1.2 Forney's Crypto Precoder . . . . . . . . . . 14.2 Worst-Case Noise and BC Rate Sums (W
WVU - MAE - 320
MAE 320 Thermodynamics HW 4 AssignmentFebruary 18, 2009 The homework is due Friday March 6, 2009. Each problem is worth the points indicated. I encourage you to work in small groups to learn this material. However, copying of the solution from anot
Cornell - MAE - 521
M&AE 521 Problem Set # 9 Posting Date: Tuesday Nov. 7th.Fall 2006You need not hand in anything. Instead, be prepared to answer any of these problems on an upcoming take-home final exam. You may discuss your solutions with classmates up until the
Wisconsin - AS - 434
Lecture 17Gametogenesis at the Chromosomal level: Mitosis and MeiosisAnimal Science 434 John J. Parrish DefinitionsChromosome - linear DNA moleculeCentromere - special region of spindle attachment Homologous Chromosomes Have the same ki
Stanford - VIEW - 080418
From Blue to Red (via Green?) Galaxy Population Gradients in Galaxy ClustersAnja von der LindenKIPAC / StanfordCosmology in Northern California, April 18th 20081Hello !KIPAC post-doc since Nov. 2007 in the XOC group PhD in Munich / at MPA
Texas A&M - CONFERENCE - 376
THURSDAY, JUNE 25WORKSHOP B (Continued) 1-2 p.m. Dr. Timothy Herman, Director for the Center for Bio-Molecular Modeling (CBM) at the Milwaukee School of EngineeringTHURSDAY, JUNE 25WORKSHOP C (Continued) 2:15-3:15 p.m. Dr. Carol Rice, Professor a
Minnesota - HIST - 1011
N. Arizona - DD - 242
TRAVELINGDanielle Davidson Dana: dd242TWO FAVORITE VACATION SPOTSFAVORITE RIDES AT DISNEYLAND1)Peter Pans Flight 2)Space Mountain 3)Splash Mountain 4)California Screamin'5)Tower of TerrorI have a big family, my mother was the youngest
ASU - MAE - 361
ASU - MAE - 361
ASU - MAE - 361
Ball State - ENG - 103
ENG 103 Argument Paper Final Due: Nov. 14 Topic: You must choose a debatable topic, with specific practical applications. By `debatable,' I mean simply a topic for which there are opposing sides or viewpoints. By `practical applications,' I mean that
St. Thomas - PHYS - 104
Special RelativityRelativity of MotionInertial Reference Frames are indistinguishable from one anotherIf I'm standing on top of a car moving at 60 mp/h and I throw a baseball at 80 mph at you standing on in front of me in the road, the baseb
UVA - CS - 101
CS 101 & 101-EFall 2007 http:/www.cs.virginia.edu/~cs101Philosophy: For centuries, the basis for education has been reading, writing, and arithmetic. Now it is reading, writing, and computing. Learning to program is an essential part of the educati
Wisconsin - PHYS - 104
Name: _ Student ID # _ Section # _ TA Name _ Fill in your name, student ID #, and section # on the Scantron sheet. Make sure that your exam has questions 1-15. There are two blank pages at the end of this exam for your "scratch" calculations.Physic
Midwestern State University - EE - 415
vti_encoding:SR|utf8-nl vti_timelastmodified:TR|22 Aug 2007 18:02:44 -0000 vti_extenderversion:SR|5.0.2.6738 vti_backlinkinfo:VX|classes/ee415/Fall_2007/index.htm
Princeton - MAE - 412
Long Island U. - OC - 0507
Algebraic Solution of a Quadratic-Linear System21-11The Substitution Method: If needed, solve for one variable in terms ofthe other Plug in equal values to create one equation with one variable Solve for that one variable Plug into the linea
UVA - LAW - 0506
April 21 faculty workshopTo: Fr:Workshop Participants Liz MagillEnclosed are two documents. Both are pieces of a larger project-that I expect to be a book-that I have started while at Princeton. My goal is to come to terms with the health, safe