Download Exam 3 Study Guide

Exam 3 Study Guide
This guide is meant to assist with studying for Exam 3 on March 27, 2017. However, it is not
comprehensive. This guide includes topic which might not be on this exam (but which might be on the
final). It is also possible that something not specifically mentioned on the guide may be on the exam.
However, remember everything on the exam is in the slides in some form. You may NOT use this sheet
when you are taking the exam.
See if you can fill in the blank on these questions (our exam will still be multiple
choice)
The Milky Way is a _________ type galaxy.
The Solar System is located in the ___________ spur.
The Sun is located ________ away from the center of the Milky Way.
The mass of the Milky Way is ________________ solar masses.
The closest galaxy to the Milky Way is the ________________.
Leavitt’s Law relates the ___________ of a Cepheid to its _____________.
Hubble’s Law relates ___________ of a galaxy to its ____________________.
G2 was an object that got close to the _____________ but survived the encounter.
The mass of a galaxy’s central black hole is related to the mass of its _______________.
The Tully-Fisher relationship relates ____________ to _______________.
The M-sigma relationship allows one to use the stellar velocity dispersion of the bulge to measure the
______________.
The theoretical upper limit for the mass of a super massive black hole is _______________.
A quasar is a type of ______________.
Blazars are AGN which are oriented such that ____________________.
The luminosity of an AGN is ________________.
The size of an AGN is about _____________ to that of the Solar System.
One day the Milky Way will collide with Andromeda and the result will be a ________ galaxy.
Questions you can answer to study. See if you can write your own multiple choice
question for these topics!
What are three properties that distinguish elliptical galaxies from spiral galaxies?
How do spiral galaxies form?
How do elliptical galaxies form?
Where in a spiral galaxy might you find star forming regions?
Where in an elliptical galaxy might you find star forming regions (hint: trick question!)?
What are some differences in stellar populations between different regions of a spiral galaxy?
How do stars move in the disk of a galaxy?
How do stars move in the bulge of a spiral galaxy?
Do you ever see halo stars in the disk of a galaxy ? If so, how could you distinguish a halo star from a
disk star?
How do spiral arms form?
What is the cosmological Principle?
What are the Magellanic Clouds?
How do astronomers measure the distances to very distant galaxies?
What is a starburst galaxy?
How did supermassive black holes form? (Trick question!)
Activities you can do to help you study for this exam.
Draw the Hubble Tuning fork and label and draw examples of different types of galaxies in the proper
regions. Try doing it in color if you have the supplies. Why do this? Because it will help you
understand the differences between different types of galaxies.
Draw and label the different regions of a spiral galaxy. Where do stars form?
Draw a diagram of the Star-Gas Cycle as shown in the Chapter 20 slides.
Draw a diagram of an Active Galactic Nuclei. Show the orientation of the viewer determines what type
of AGN is observed.