Here's a First. Astronomers See a Moon Forming Around a Baby Exoplanet

Astronomers have discovered, for the first time, moons forming in the disk of debris around a large exoplanet. Astronomers have suspected for a long time that this is how larger planets--like Jupiter in our own Solar System--get their moons. It’s all happening around a very young star named PDS 70, about 370 light years away …