Galaxy and Solar System

Front

What is a galaxy?

Back

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.

Front

What is a solar system?

Back

A solar system is a group of celestial objects, including the Sun, planets, moons, asteroids, and comets, that are gravitationally bound to the Sun.

Front

What are the differences between a galaxy and a solar system?

Back

A galaxy is a massive collection of stars, gas, and dust, including many solar systems, held together by gravity. A solar system is a group of celestial objects bound to a star, like the Sun.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our Solar System. It is a barred spiral galaxy, and its name comes from its appearance as a dim "milky" glowing band arching across the night sky.

Front

What is the role of gravity in a galaxy?

Back

Gravity is the force that holds a galaxy together. It binds stars, gas, and dust into a coherent structure and governs the motion of objects within the galaxy.