The International Space Station will be visible over much of South-Central Pennsylvania Tuesday night. Video above: Headlines ...

Two NASA astronauts will perform the year's first spacewalk today (Jan. 16), and you can watch the action live. Nick Hague and Suni Williams are scheduled to venture outside the International Space ...

NASA's NICER X-ray telescope is pausing operations just weeks after the US space agency boasted that a January repair and reconfiguration had improved its daytime measurements.… The agency pressed ...

The ISS appears tiny against the moon's vastness — and it's almost 239,000 miles closer. Can you see the ISS? The photo has another Easter egg too — a site for future human moon landings. The moon isn ...