The Moon is often described as a pristine, silent world. No rain, no wind, no atmosphere to speak of. What that also means, in a very practical sense, is that nothing up there rusts, erodes, or gets buried under leaves.

Apollo astronauts described lights "sailing off into space" and skies like the "Fourth of July" in newly declassified Pentagon UFO transcripts.

While there is no immediate danger, this crash highlights that space junk is increasingly expanding out of lower-Earth orbit

Saturn and the moon will appear close together in the night sky in an event known as a conjunction. The celestial event will be visible for one night on Friday, January 23, after sunset. To see the conjunction, observers in the Northern Hemisphere should ...