Galaxies in the Cosmos Quiz

How many galaxies do astronomers estimate to be in the cosmos?

• 100 to 200 billion

• 50 to 100 billion

• 300 to 400 billion

• 200 to 300 billion

What holds galaxies together?

• Magnetism

• Centrifugal force

• Gravity

• Friction

Tags

NGSS.HS-PS2-4

What are the three main types of galaxies?

• Big, Medium, Small

• Spirals, Ellipticals, Irregulars

• Red, Blue, Green

• Circular, Oval, Rectangular

What is the centerpiece of a spiral galaxy called?

• Ring

• Disc

• Halo

• Bulge

What is the shape of an elliptical galaxy?

• Circular

• Oval

• Spiral

• Rectangular

What percentage of known galaxies in the universe are spiral galaxies?

• 90%

• 50%

• 33%

• 77%

What is the main characteristic of irregular galaxies?

• Large size

• Evenly spread out stars

• Spiraled arms

• Indistinct shape

What is in the center of the Milky Way Galaxy?

• Worm Hole

• Black Eye

• Super Massive Black Hole

• Neutron Star

What is the main factor that determines the appearance of irregular galaxies?

• Black holes

• Solar flares

• Collisions

• Supernova explosions

What is the closest galaxy to the Milky Way?

• Milky Way

• Andromeda

• IC1101

• Black Eye