Galaxy

What is a galaxy?

• A type of asteroid

• A group of stars, clouds of gas, and dust particles moving together

• A planet with its moons

• A single star in the universe

How many galaxies are there in the universe?

• Millions

• Thousands

• Hundreds

• Billions

What galaxy is the Earth part of?

• Sombrero Galaxy

• Milky Way Galaxy

• Andromeda Galaxy

• Whirlpool Galaxy

What is the largest galaxy in the Local Group?

• Magellanic Clouds

• Triangulum Galaxy

• Andromeda Galaxy

• Milky Way Galaxy

How far can a light-year reach?

• About 9.5 billion kilometers

• About 9.5 million kilometers

• About 5.8 trillion miles

• About 5.8 million miles

What shape do spiral galaxies have?

• Like a round ball

• Like an American football

• No definite shape

• Like pinwheels

What are elliptical galaxies shaped like?

• Irregular shapes with no center

• Perfectly round disks

• A round ball or stretched out like an American football

• Pinwheels

What kind of stars do spiral galaxy arms contain?

• Only old stars

• Only new stars

• Mainly younger stars

• No stars

What is the most common kind of galaxy in the universe?

• Elliptical galaxies

• Spiral galaxies

• Lenticular galaxies

• Irregular galaxies

What can cause irregular galaxies to form?

• The merging of several galaxies

• The explosion of a single star

• Being too close to a black hole

• A lack of stars