A galaxy is a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter. The word is derived from the Greek galaxias, literally "milky", a reference to the Milky Way.

What does the term Galactic refer to?

1 : of or relating to a galaxy and especially the Milky Way galaxy. 2 : huge a galactic sum of money.

What is a galaxy for kids?

A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity. We live on a planet called Earth that is part of our solar system. ... It's a small part of the Milky Way Galaxy.