When you look up in the night sky, our moon is unmissable.Just like Earth, it's round and has a solid, rocky surface. But is ...

"Vanishing Treasures," by Katherine Rundell, is a passionate plea to save the planet's living cabinet of curiosities.

But is our moon actually a planet? The answer is technically no — at least according to NASA and the International Astronomical Union (IAU), an important global authority in astronomy.

The answer, you will not be surprised to learn, depends on the planet in question. The presence of a pole star in the northern hemisphere, and its absence in the south, is a historical coincidence.

Most astronomers would love to find a planet, but Mike Brown may be the only one proud of having killed one. Thanks to his research, Pluto, the solar system’s ninth planet, was removed from the ...

October 1986, at the dedication of the Carter Presidential Library and Museum. War may sometimes be a necessary evil. But no ...

From the fearsome Nurburgring to Sebring's ultra-flat airstrip circuit, these are the most unbelievable race tracks in Formula 1 history.

So, with that, here's Part 1 of "A Year on Planet Earth": Although there are no signs that volcanic activity is increasing globally, it was nonetheless quite a spectacular year for eruptions. As of ...