Astronomers have discovered four planets that are just a fraction of the mass of Earth orbiting Barnard’s Star, which is 6 ...

The new work represents “the strongest statistical evidence yet that Planet 9 is really out there”, he said. In the new work, scientists looked at a set of trans-Neptunian objects, or TNOs ...

Seven planets are putting on a parade in the night ... "They're going to be low on the horizon when the sun is setting. So you have to see to the west," she explained. "The key is see where ...