Deck 74: Mass and Motions in the Milky Way

Question 1

The rotation curve of the galaxy implies that

A) inner stars are moving faster and outer stars are moving slower.
B) inner stars are moving slower and outer stars are moving faster.
C) inner stars are moving at about the same speed as outer stars.
D) there is no pattern of speed and distance from center for stars.

Answer 1

inner stars are moving at about the same speed as outer stars.

Question 2

This phenomenon creates spiral arms and recreates them:

A) density wave
B) gravity wave
C) spiral wave
D) light wave

Answer 2

density wave

Question 3

The problem which should destroy our spiral arms over time is known as _____.

A) pattern problem
B) dark matter problem
C) winding problem
D) wave problem

Answer 3

winding problem

Question 4

When supernovas promote more star formation this is called ____.

A) supernova debris
B) self-propagating star formation
C) explosion propagation
D) black hole propagation

Question 5

The inner parts and outer parts of the Galaxy have ____________ rotation.

Question 6

Matter that is unseen is called _____.

Question 7

Most of the Galaxy is made of dark matter.

Question 8

The core of the Galaxy is called Sagittarius A*.