
NASA astronaut Scott Kelly shared this photograph on social media, taken from the International Space Station on Sept. 10, 2015.…

The night sides of Saturn and Tethys are dark places indeed.

APOD Science APOD APOD: 2015 September 14 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …

This high-dynamic range (HDR) photo of the Stratospheric Observatory for Infrared Astronomy (SOFIA) was captured just before sunset at the…

APOD Science APOD APOD: 2015 September 13 – A… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss…

Ground Support Engineer Greg Perryman services the FORCAST instrument onboard the Stratospheric Observatory for Infrared Astronomy (SOFIA) during the observatory’s…

Jim Green, director of Planetary Science at NASA Headquarters in Washington, attends the world premiere for "The Martian” on day…

NASA Astronaut Tracy Caldwell Dyson and her husband George attend the world premiere for "The Martian” on day two of…

APOD Science APOD APOD: 2015 September 12 –… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss …

Actress Nichelle Nichols and Airborne Astronomy Ambassadors pose in front of the observatory telescope during their pre-flight safety training on…