G3 (ATLAS) is now visible in the post-sunset night sky. It's best seen in the Southern Hemisphere, but it's visible north of ...

Suni Williams stepped out on a spacewalk, her first since arriving at the International Space Station seven months ago ...

Pandora, a small satellite mission poised to provide in-depth study of at least 20 known planets orbiting distant stars to determine the composition of their atmospheres cleared an important milestone ...