The Alpha CubeSat team — a student-led group in Cornell’s Space Systems Design Studio that creates spaceflight technology — successfully deployed the world’s first free-flying light sail into Earth’s ...

Our aurora forecast live blog tells you everything you need to know about the likelihood of seeing the northern lights tonight and for the days ahead. We'll also report on relevant solar activity and ...

This baffling footage shows dozens of mysterious glowing dots hovering over city buildings in the night sky. The clips, filmed in China, have sparked fears among local residents it could be a sign of ...