But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both planets and moons. And on the flip side, they can be very different between ...

According to new information on SkySafari 6 Pro, a program used to predict the placement of stars and planets, Thursday, Aug.

A New Mexico State University astronomer has discovered a gap in planet sizes that could provide insights into planet formation and the universe's origins.