Ch 2 Lesson 3: Stars, Galaxies, & The Universe

This type of galaxy is football-shaped.

• spiral

• elliptical

• Milky Way

• irregular

This type of galaxy has no definite shape.

• Andromeda

• spiral

• elliptical

• irregular

This type of galaxy has arms extending from a center area.

• elliptical

• spiral

• irregular

• Messier 87

What does the Big Bang Theory state?

• When stars explode, they make a big bang in space.

• The universe began from a single point and is still expanding.

• The universe is collapsing and will cause a big bang.

• Girls in the 80's had to use a lot of hairspray to get big bangs.

What units do astronomers use to measure distances between stars?

• light years

• AU's

• km

• star miles

Spherical objects that emit light and thermal energy (heat) are:

• moons

• planets

• asteroids

• stars

Huge collections of stars, dust, and gases that are classified by shapes are called:

• asteroid belts

• solar systems

• galaxies

• constellations

_____ pulls clusters of stars together in most galaxies.

• Dust

• Gravity

• Dark matter

• Love

In what galaxy do we live?

• Milky Way

• Proxima Centauri

• Snickers

• Local Group

In what part of our galaxy is Earth located?

• at the outermost edge

• within one of the arms

• near the center

• in the exact center