1. Consider two stars with apparent magnitudes 0 and 3. Which is brighter to our eyes, and by how much?
2. When we say that distant galaxies are "red shifted", what is happening and why?
3. Draw a rough picture of the H-R diagram and identify: the axes, Main sequence, locations of other star types. Also, what is the general significance of the H-R diagram?
4. Why do we care about other types of (non-visible) electromagnetic radiation emitted from stars, galaxies, etc?
5. Define and distinguish between a light-year and a parsec.
6. Consider an asteroid orbiting the Sun with a semi-major axis of 3 AU. Assume that the orbit is pretty elliptical.
a. Draw a labeled picture to represent this.
b. Where is it traveling fastest and slowest?
c. How long does it take to orbit the Sun once?
