
This long-exposure Hubble image of massive galaxy cluster Abell 2744 is the deepest ever made of any cluster of galaxies.

Kepler Planet Candidates, January 2014

APOD Science APOD APOD: 2014 January 7 – M7:… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss…

An Orbital Sciences Corporation Antares rocket is seen as it is rolled out to launch Pad-0A at NASA's Wallops Flight…

An Orbital Sciences Corporation Antares rocket is seen as it is rolled out to launch Pad-0A at NASA's Wallops Flight…

An Orbital Sciences Corporation Antares rocket is seen as it is rolled out to Launch Pad-0A at NASA's Wallops Flight…

An Orbital Sciences Corporation Antares rocket is seen as it is rolled out to launch Pad-0A at NASA's Wallops Flight…

A nighttime view of Salt Lake City, Utah.

NASA astronaut Mike Hopkins, Expedition 38 flight engineer, performs in-flight maintenance on combustion research hardware.

NASA astronaut Rick Mastracchio, Expedition 38 flight engineer, performs troubleshooting on the Biorack centrifuge for NanoRacks.