Mercury now shines at magnitude 0 in Gemini and is visible in the western sky for about an hour and a half after sunset. The ...

On a clear night, the moon you gaze upon looks the same as it looked for the first humans that walked Earth—the same ...

"The two of us together — we're using this as an occasion to explore elements of who and what we are, and how we became who ...

New images from NASA's Curiosity Mars rover show the first close-up views of a region scientists had previously observed only ...