A new explanation for the solar system's radioactive elements suggests Earth-like planets might be found orbiting up to 50 ...

Earth sits in a harsh galaxy filled with high-energy particles that can strip atmospheres, scramble DNA, and sterilize worlds ...

It's just a matter of time before a dead star reignites in space 3,000 light years away. And you'll be able to see it with the naked eye despite the distance. Astronomers say when the explosion ...

NASA plans to launch a mini satellite into Earth's orbit that could revolutionize astronomy as we know it.