Test #4 Objectives: 2

Question 1

2 explanations for radio galaxies forming?

Answer 1

1. Collisions between galaxies

2. Exploding nucleus in a single galaxy

Question 2

Why were the first quasars hard to identify?

Answer 2

The red shift was huge!

Question 3

Place galaxies in order of energy output:

Answer 3

1. Normal Galaxies
2. Radio Galaxies
3. Seyfert Galaxies
4. Quasars

Question 4

Define cosmology

Answer 4

The study of origin, evolution and structure of the universe

Question 5

Cosmological Principle is

Answer 5

The universe is the same everywhere (Big Bang)

Question 6

Perfect Cosmological Principle

Answer 6

The universe is the same everywhere and everywhen (Steady State Theory)

Question 7

How do we estimate the age of the universe?

Answer 7

Reciprocal of Hubble’s Constant

Question 8

How old is the universe?

Answer 8

13.8 Billions years old

Question 9

2 Things supporting the Big Bang

Answer 9

1. 3 Kelvin Radiation exists

2. 90% Hydrogen 10% Helium is the universe’s composition

Question 10

3 Ways Hubble’s Law is used?

Answer 10

1. Distance to galaxies
2. Age of universe
3. How universe was formed

Question 11

Nobel Prize was won for?

Answer 11

Discovery of 3 Kelvin radiation

Question 12

Collision Theory for the Solar System says?

Answer 12

Two stars collided and formed the Solar System

Question 13

Nebular Theory for the Solar System says?

Answer 13

Dust cloud contracted, and threw out material to form the Solar System