Hubble revealed a universe of galaxies that existed beyond ours — but he couldn't have done it without a little help.

The Milky Way is our galactic home, but just how big is it?  Dive into this fascinating exploration of the galaxy's size, scale, and structure. Get ready for an astronomical perspective on our place ...

Indeed, our galaxy is so huge that dozens of lesser galaxies scamper about it, like moons orbiting a giant planet. As a result of its vast size, the Milky Way can boast at least one planet with ...