1. Explain the difference between a Doppler redshift and a cosmological redshift. 2. In what ways are the fate of the universe, the shape of the universe, and the average density of the universe...

1. Explain the difference between a Doppler redshift and a cosmological redshift.

2. In what ways are the fate of the universe, the shape of the universe, and the average density of the universe related?

3. Assuming that the universe will expand forever, what will eventually become of the microwave background radiation?