Rising carbon dioxide levels are quietly reshaping Earth’s upper atmosphere, thinning the very layer of air that drags old satellites to a fiery end. At the same time, an intensifying solar cycle is ...

Add Yahoo as a preferred source to see more of our stories on Google. All things that go up must eventually come down. NASA says that its Van Allen Probe A satellite has fallen precipitously back to ...

Add Yahoo as a preferred source to see more of our stories on Google. A cargo resupply spacecraft is on its way back to Earth from the International Space Station, where it's expected to soon make a ...

Artemis II’s journey back to Earth will likely trigger a “sonic boom” so strong that it could end up rattling windows in parts of Southern California, according to officials. The gumdrop-shaped Orion ...

The Van Allen Probe A satellite spent seven years measuring radiation and nearly 14 years total in space. Johns Hopkins Applied Phyics Laboratory All things that go up must eventually come down. NASA ...