Galaxies Quiz

What is a galaxy?

• A collection of comets

• A collection of stars

• A collection of planets

• A collection of asteroids

How many stars are estimated to be in the Milky Way galaxy?

• 100 million

• 200 billion

• 500 billion

• 1 trillion

What is the Milky Way galaxy classified as?

• Elliptical galaxy

• Spiral galaxy

• Irregular galaxy

• Lenticular galaxy

What is the Andromeda Galaxy's predicted fate with the Milky Way?

• They will drift apart in 5 billion years

• They will never interact

• They will merge in 3 billion years

• They will collide in 1 billion years

What is the shape of elliptical galaxies?

• Cubes

• Spheres

• Pyramids

• Cones

What is the main component of spiral galaxies that spiral out from the central disk?

• Asteroids

• Planets

• Gas

• Black Holes

What surrounds the central disk of a spiral galaxy?

• A belt of asteroids

• A cloud of gas

• A spherical halo of globular clusters and older stars

• A ring of ice

What is the primary factor in the formation of irregular galaxies?

• Black hole activity

• Star collisions

• Gravitational pull from neighboring galaxies

• Supernova explosions

What is the main characteristic of irregular galaxies?

• They are perfectly symmetrical

• They have a high percentage of young stars

• They lack internal structure

• They are always spiral-shaped

What is the estimated number of galaxies in the universe?

• At least 100 billion

• At least 50 billion

• At least 500 billion

• At least 10 billion