Front

What is the term for a scientist that studies stars, planets, and other objects in space?

Back

Astronomer

Front

What is the term for all of space and everything in it?

Back

Universe

Front

What type of galaxy is characterized by a flat, rotating disk containing stars, gas, and dust, and often a central concentration of stars known as the bulge?

Back

Spiral Galaxy

Front

What type of galaxy has an irregular shape and does not fit into the other categories?

Back

Irregular Galaxy

Front

What type of galaxy is smooth and featureless, often containing older stars and little gas and dust?

Back

Elliptical Galaxy

Front

What is the name of our galaxy?

Back

Milky Way Galaxy

Front

What is the term for a large system of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity?

Back

Galaxy

Front

What is the difference between a galaxy and a solar system?

Back

A galaxy is a massive system containing billions of stars, while a solar system consists of a star and the celestial bodies that orbit it.

Front

What is the approximate number of galaxies in the observable universe?

Back

Over 2 trillion galaxies.

Front

What is the primary force that holds galaxies together?

Back

Gravity