Defining a galaxy sounds so simple. We all know what a galaxy is, right? Well, not really. Surprisingly, there is no universally agreed upon definition and the ones generally bandied around leave a ...

Spiral galaxies are twisted collections of stars and gas that often have beautiful shapes and are made up of hot young stars. Most of the galaxies that scientists have discovered so far are spiral ...

Take some time out of your day to ooh and ahh at the beauty of the universe — Hubble has shared another stunning image of a nearby galaxy. The Hubble Space Telescope has produced this gorgeous high ...