The formation of Mercury remains an unsolved mystery. The planet closest to the sun has a disproportionately large metallic core—accounting for about 70% of its mass—and a relatively small rocky ...

With hundreds of satellites launched every year, in-space collisions and the creation of fast-moving fragments of space debris—or 'space junk'—are becoming increasingly likely, threatening our ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. This story was updated at 7:28 p.m. EST. WASHINGTON — Iridium Satellite LLC confirmed today that ...

China was forced to postpone the return of three astronauts from its Tiangong space station following a suspected collision with space debris that appears to have struck the spacecraft they were ...

Low Earth orbit, where most satellites operate, has become a whirlwind of metal shards and dead, tumbling debris. Anyone with hardware or human crew in orbit knows the drill. Orbital collision ...

A new phase of the space race is unfolding far above Earth, but its effects may not stay there. Satellite launches have increased sharply recently, la.

Two enormous space rocks have slammed together in a nearby planetary system, and for the first time astronomers have watched the dusty aftermath unfold almost in real time. The violent impact, ...