Download Homework #1 Questions

Homework #1 Questions
These questions are found at the end of the appropriate units of the textbook,
“Pathways to Astronomy: Volume 2 Stars & Galaxies,” by Scneider and Arny.
Unit 69
Question for Review #3: How are star clusters useful for testing stellar evolutionary
theory?
Unit 70
Question for Review #2: How do we know our galaxy is a flat disk?
Question for Review #4: What effects did dust have on the determination of the size of
the Milky Way?
Problem #1: How long does it take light from the center of the Milky Way, 8 kpc away,
to reach the Solar System?
Unit 71
Question for Review #4: What is the eventual fate of the Milky Way?
Unit 73
Question for Review #3: What is the evidence for a black hole at the center of the Milky
Way?
Problem #1: Given that the Sun moves in a circular orbit of radius 8 kiloparsecs around
the center of the Milky Way, and its orbital speed is 220 km/sec, work out how long it
takes the Sun to complete one orbit of the galaxy.
Problem #4: What is the Schwarzschild radius of a black hole with the mass of the black
hole thought to be at the center of the Milky Way? (See Unit 68.)
Unit 75
Question for Review #1: What are the main types of galaxies?
Question for Review #2: How do the basic galaxy types differ in shape, stellar content,
and interstellar matter?