Our sun is a loner. It lacks a stellar companion hurtling through interstellar space with it. But we've known for a long time ...

Scientists believe a dust-filled ring just outside Jupiter acted like a cosmic “planetesimal factory,” producing multiple generations of early space rocks with very different compositions. The ...

Explorers have stumbled upon what appears to be a massive stone doorway carved into the remote Dzungarian Alatau mountains of Kazakhstan, igniting widespread speculation about its origins. The ...