Review 2

Three important questions:

What do we observe in the Universe now

What is the fate of the Universe

How did the Universe begin

Concepts

Name 5 most important concepts discussed since the last test

Distance ladder

Hubble Law

Formation and distribution of galaxies

Big Bang

Critical density

Cosmic Distance Ladder

Fig. 24-29

Milky Way

Fig. 23-10

Formation of Milky Way

Fig. 23-14

Dark Matter

Fig. 23-19

Galaxy Formation

Fig. 26-28

Spirals, Ellipticals, Irregulars

Size and color

Active Galaxies

Fig. 25-16

How activity of supermassive black hole has changed in time

Quasars can probe early Universe

Matter Universe

Fig. 27-1

Cosmic Microwave Background

Fig. 26-16, 27-16

Critical Density

Fig. 26-10, 26-11

Big Bang Epochs

Fig. 27-04