what is a galaxy in space
We live on a planet called Earth that is part of our solar system. But where is our solar system? Itâs a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, dust, and billions of stars and their solar systems. A galaxy is held together by gravity. Our galaxy, the Milky Way, also has a supermassive black hole in the middle. When you look up at stars in the night sky, youâre seeing other stars in the Milky Way. If itâs really dark, far away from lights from cities and houses, you can even see the dusty bands of the Milky Way stretch across the sky.