
The far side of the Moon is rough and filled with craters. By comparison, the near side of the Moon,…

NASA astronaut Chris Cassidy, Expedition 36 flight engineer, participates in a session of extravehicular activity (EVA) as work continues on…

APOD Science APOD APOD: 2013 July 17 – A… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss…

The SOFIA flying observatory deployed to Christchurch, New Zealand, in July 2013 for an opportunity to study the skies above…

Hubble's view of Comet ISON on April 10, 2013.

A very anomalous weather pattern is in place over the U.S. for mid-July. Trapped between an upper level ridge centered…

Before departing for Earth on June 22, 1973, the first Skylab crew took this image of the Skylab space station.

NASA astronaut Chris Cassidy, Expedition 36 flight engineer, performs a visual exam using an eye chart (out of frame) in…

NASA astronaut Chris Cassidy, Expedition 36 flight engineer, performs a visual exam using an eye chart (out of frame) in…

NASA astronauts Karen Nyberg and Chris Cassidy (top) along with European Space Agency astronaut Luca Parmitano (right), all Expedition 36…