Review of Cosmology Lecture

Astronomy 25

1) Cosmology is a study of _____________________________________.

2) Early astronomers thought that galaxies were ____________________.

3) The most prominent Cosmologist of modern times was _______________.

4) He proved the misnamed “nebulae” were really stars using __________ variable stars, a process discovered in 1912 by _____________________.

5) It is important to include all your work in lab reports. T / F

6) Hubble detected a movement of galactic spectra known as the ____ _____.

7) A blue-shift indicates an object is moving away from you. T /F

8) Hubble found that some/ none/ most galaxies were receding from us.

9) Hubble’s Law can be stated as follows:

1) All galaxies exhibit ______ ______.

2) Far away galaxies move away ________.

10) Hubble’s Constant is thought to be about ___ km/sec/megaParsec.

11) This would make the Universe about ____________ years old.

12) We have a rough idea what went on just before the Big Bang. T /F

13) The Universe is thought to probably be expanding/contracting/stable?

14) The problem of fixing a value for S, the Cosmological constant that will determine this, is measuring how much _________ there is in the Universe.

15) The stuff we can’t see, that collectively has a big influence on S is called _________ __________.