By Lilian Satterlee
When you look up at the night sky, you might only see tens of stars in the area of your galaxy. But all you see is not all there is! Our galaxy has not only 50 stars, but billions. We live in a galaxy called the Milky Way, a spiral galaxy with hundreds of thousands of billions of stars.
|Our Milky Way Galaxy|
|IC 1011, largest known galaxy|
M 87 is one of the oldest galaxies in the known universe.
|Our neighbor, Andromeda|
How Galaxies Formed!
It takes gravity to make stars and pull them together. Early galaxies were a big mess; lumpy clumps of stars, dust and gas. Today, galaxies are neat and organized, and gravity is what makes that happen.
So remember, galaxies are made of billions of stars and there are billions of galaxies!