Add Yahoo as a preferred source to see more of our stories on Google. An explosion in space so massive you'll be able to look up and see it in the night sky without a telescope could happen "any day ...

The stars aren’t fixed and unchanging, unlike what many ancient people thought. Once in a while, a star appears where there wasn’t one before, and then it fades away in a matter of days or weeks. The ...

At least two mass extinction events in Earth's history were likely caused by the "devastating" effects of nearby supernova ...

An explosion in space so massive you'll be able to look up and see it in the night sky without a telescope could happen "any day now," a NASA expert said Wednesday. The stellar burst, called a nova, ...