Learn how Roemer learned that light does take time to travel.
Astronomers are learning more about the brightening and dimming of stars.
How do you know the sun didn't just explode? We aren't talking about the everyday, run-of-the-mill controlled explosion the sun is always doing, but a big boom.
What if the aliens are hiding from us? Hiding a whole planet is easier than you think.
It may sound far-fetched, but humanity faces a major potential danger: someday, there might be a gigantic explosion on the sun.
Pluto is too small to be considered a planet anymore, but our solar system appears to have a new ninth planet.
NASA wants YOU to help them make new discoveries! Crowdsourcing alleviates big data problems for astronomers.
Have you ever wondered why comets look the way they do when they get close to the sun?
There are a million space rocks nearby. Astronomers have only mapped about 9,700 of them.
When it comes to saving the Earth from threatening astroids, Bruce Willis can only do so much.