Don Pettit, a NASA astronaut currently aboard the International Space Station, uses his camera to capture stunning images of ...

For several years now, we've been following a tantalizing story indicating that the high heat of the ash cloud generated when Mount Vesuvius erupted in 79 AD was sufficiently hot to turn one of the ...

A celestial body is any natural object outside Earth's atmosphere. This includes stars, planets, moons, asteroids, comets, dwarf planets and meteoroids.