1. What is a standard candle? Why are standard candles important to astronomers trying to measure the Hubble constant? 2. What kinds of stars would you expect to find populating space between galaxies...

1. What is a standard candle? Why are standard candles important to astronomers trying to measure the Hubble constant?

2. What kinds of stars would you expect to find populating space between galaxies in a cluster?

3. Suppose a spectrum of a distant galaxy showed that its redshift corresponds to a speed of 22,000 km/s. How far away is the galaxy in Mpc?