Sam's Believe It Or Not! Galactic Wonders!
Our Milky Way contains over 100 billion stars and stretches about 100,000 light-years across—if it were a pancake, you’d need a trillion of them to cover Earth. Andromeda, our nearest spiral neighbor, is on a collision course with the Milky Way in about 4 billion years—imagine two galactic dancers... Sign in to see full entry.