This week, an old astronomical controversy is renewed as researchers present new evidence for a hidden "Planet X" in our ...

If you have kids in school, or even if you don’t, you’ve probably realized that there’s a lot about the day-to-day of school ...

Is frozen water scattered in systems around other stars? Astronomers have long expected it is, partially based on previous ...

Did you know our solar system might have had an extra planet? Scientists believe a mysterious ninth planet once existed but ...