Exploring Galaxies in the Universe

What is a galaxy?

• A galaxy is a collection of only dark matter.

• A galaxy is a massive system of stars, gas, dust, and dark matter bound by gravity.

• A galaxy is a small cluster of planets.

• A galaxy is a type of star.

How many galaxies are estimated to be in the universe?

• Roughly 500 million

• About 100 billion

• Nearly 1 million

• Approximately 2 trillion

What is the name of our galaxy?

• Milky Way

• Whirlpool

• Triangulum

• Andromeda

What shape is the Milky Way galaxy?

• Circular

• Irregular

• Barred spiral

• Elliptical

What are the two main types of galaxies?

• Spiral galaxies and elliptical galaxies

• Lenticular galaxies and irregular galaxies

• Pulsar galaxies and quasar galaxies

• Dwarf galaxies and supermassive galaxies

What is a spiral galaxy?

• A spiral galaxy is a galaxy that only contains dark matter.

• A spiral galaxy is a galaxy with a flat, rotating disk and spiral arms.

• A spiral galaxy is a galaxy that has no defined shape.

• A spiral galaxy is a type of star that forms in clusters.

What is an elliptical galaxy?

• A galaxy that is primarily composed of gas and dust, forming new stars.

• A galaxy that is irregular in shape and contains a mix of young and old stars.

• An elliptical galaxy is a smooth, featureless galaxy with an ellipsoidal shape, containing mostly older stars.

• A spiral galaxy with a central bulge and arms extending outward.

What is the closest galaxy to the Milky Way?

• Triangulum Galaxy

• Andromeda Galaxy

• Whirlpool Galaxy

• Sombrero Galaxy

What is a galaxy cluster?

• A galaxy cluster is a type of star.

• A galaxy cluster is a collection of planets.

• A galaxy cluster is a single galaxy.

• A galaxy cluster is a large group of galaxies held together by gravity.

What role do galaxies play in the universe?

• Galaxies serve as the fundamental units of the universe, shaping its structure and facilitating star formation.

• Galaxies are static structures that do not influence the evolution of the universe.

• Galaxies are merely collections of planets that orbit around a central star.

• Galaxies are primarily composed of dark matter and have no impact on star formation.