Solar Lab
Astronomy 101
B07
Professor: Russell Robb T.A: Chelsea Spengler
Due: October 11th 2013
Objective/Purpose:
To track how fast the sun rotates in a year by using sunspots and angles to
determine the average movement of the rotation.
Introduction/Th
Night Lab Report #1
Astronomy 101
JB
Proffesor Russell Robb
Due: September 13th 2013
Objective/Purpose:
To have a stronger understanding how to observe the night sky with a
confident knowledge of locating planets, stars, galaxies, nebulae and the use of
t
Lab #8 SETI
Astronomy
J B B07
Professor: Russell Robb T.A: Chelsea Spengler
Due: November 8th 2013
Objective/Purpose:
To recognize how to find planets from their orbit around stars and to use
educated assumptions to apply to the Drake equation for estimat
Lab Report #2
Astronomy 101
J B B07
Professor: Russell Robb T.A: Chelsea Spengler
Due: September 27th 2013
Objective/Purpose:
To be familiar with the planets motion and location throughout the year and
how to predict where and when they will be in the sky
Lab #9 Lunar Imaging
Astornomy 101
J B B07
Professor: Russell Robb T.A: Chelsea Spengler
Due: October 25th 2013
Objective/Purpose:
To be familiar with the properties of the moon, by observing features on its
surface such as its craters and Maria.
Introduc
Astronomy 201 Assignment #3
1.
a) One of the simplest and most convincing arguments for common descent of all life on earth is
the study of gene sequences, more specifically: phylogenetic reconstruction. This method is used
to try and construct a phylogen
Astronomy Assignment #4
1) Blackbody Temperature of Mars:
2)
a) Some of the earliest fossil cells depicted as unicells in spherical and fibrous growth forms,
were found by a team, led by Dr David Wacey of the University of Western Australia and
including
Astronomy Assignment #1
1) It takes about 8 minutes and 20 seconds for light to travel from the surface of of the Sun to
the Earth.
A light second:
A light hour:
A light year:
2)
a) Since light takes time to travel we never actually see light in the curre
2
Distance dimming
Consider a 100W light bulb. If you cup your hands around the bulb very close to it but not
touching it your hands will absorb 100W (100 Joules per second) of radiant energy1 . This is
called the luminosity of the bulb, i.e. L = 100 W.
W
3 THE LOCAL GROUP
3
1
The local group
The local group (LG) of galaxies is dominated by the bright spiral galaxies, the Milky Way and
Andromeda (M31).
The LG may be dened as all galactic systems bound gravitationally to the MW and M31.
This can be dicult t
2 A UNIVERSE OF GALAXIES
2
1
A Universe of galaxies
Stars exist in galaxies but galaxies are distributed throughout the Universe. Therefore, to understand questions such as the physical origins of galaxies, distances to galaxies and the ages of stars
in g
1 INTRODUCTION
1
1
Introduction
A good working denition of a galaxy is a population of stars, gas and dust bound gravitationally
within a dark matter halo.
Set Christianson text as reading on the early history of galaxy studies and Hubbles conrmation
that
4 ELLIPTICAL GALAXIES
4
4.1
1
Elliptical galaxies
Inferring the density from the surface brightness
The surface brightness prole, which essentially traces the distribution of stars, can be used to infer
the underlying 3D matter density distribution.
The p
ASTR 201 Assignment 2
1. You are analyzing Moon rocks that contain small amounts of uranium-238, which decays into
lead with a half-life of 4.5 billion years.
(a) In one rock from the lunar highlands, you determine that 55% of the original uranium-238
rem
ASTR 201 Assignment 6
Due 12.30pm Friday 30th October.
1. Using the data in Appendix E.3 of the textbook (or taken from the web) determine if Enceladus
is in orbital resonance with any other major Saturnian moons? Note that if the ratio of orbital
periods
ASTR 201 Assignment 1: Solutions
1. Given that the velocity of light is 3 108 ms1 , dene a light-second, a light-hour and a
light-year in metres. Express your answer scientic notation. How long does it take light to
travel from the surface of the Sun to t
ASTR 201 Assignment 5: Solutions
1. Sojourner was the rover component of the 1997 Mars Pathnder mission. Sojourner was
powered by a solar array with a battery backup. Calculate the maximum solar generated
electric power available to Sojourner. The followi
ASTR 201 Assignment 7: Solutions
1. Assume that the Milky Way Galaxy has 500 billion stars. Based on the statistics presented
in the textbooks and lecture, how many would be Sun-like G-stars? How many would be K
stars? How many would be M stars? If you as
1
ASTR 405 Assignment 2: Solutions
The marks for each question are indicated in parentheses. A total of 16 marks are available.
1. Derive an expression for the angular diameter distance as a function of redshift in an Einstein
de Sitter universe. The radi
4 BIG BANG NUCLEOSYNTHESIS
4
4.1
1
Big Bang Nucleosynthesis
Introduction
The theory describing the creation of light elements in the universe is, together with the properties of the CMB, one of the physical cornerstones of the Hot Big Bang model of the un
1
ASTR 405 Assignment 5: Solutions
The marks for each question are indicated in parentheses. A total of 18 marks are available.
1. Consider a survey to detect quasars gravitationally lensed by foreground galaxies. The probability that a foreground galaxy
1
ASTR 405 Assignment 3: Solutions
Due 10am Thursday 6th February
The marks for each question are indicated in parentheses. A total of 23 marks are available.
1. What is the Sachs-Wolfe eect? In what way does it aect the observed properties of the
CMB (20
1
ASTR 405 Assignment 1: Solutions
The marks for each question are indicated in parentheses. A total of 20 marks are available.
1. Conduct a literature search to answer the following questions:
(a) What is the current expansion rate of the universe expres
1
ASTR 405 Assignment 4: Solutions
The marks for each question are indicated in parentheses. A total of 15 marks are available.
1. For each scenario described below compute the primordial abundance of Helium-4 assuming
that all available neutrons are conv
3 THE COSMIC MICROWAVE BACKGROUND
3
1
The Cosmic Microwave Background
The Cosmic Microwave Background (CMB) radiation is observed as an all sky radiation eld whose
peak emission occurs in the mmwavelength region of the electromagnetic spectrum (confusingl
2 MEASURING THE UNIVERSE
2
1
Measuring the universe
We have seen so far that the cosmological model is expressed is highly geometric terms, i.e. a
homogeneous and isotropic line element dened by a time varying scale factor and a spatial curvature
term. Co
1 A MATHEMATICAL DESCRIPTION OF THE UNIVERSE
1
1
A mathematical description of the universe
The broad aim of cosmology is to build a mathematical model that describes the observed properties
of the universe. Furthermore, any model must change to accommoda
6 LARGESCALE STRUCTURE
6
6.1
1
Largescale structure
Introduction
The global properties of the universe geometry, chemistry and early density uctuations are well
described by GR, BBN and CMB respectively. The present day universe displays great complexity