APOD Science APOD APOD: 2017 March 31… Today’s APOD Archive Submissions Index Search Calendar RSS Education About Discuss APOD…
Scientists have discovered a mysterious flash of X-rays using NASA’s Chandra X-ray Observatory, in the deepest X-ray image ever obtained.
Expedition 51 backup crew members Sergey Ryazanskiy and Randy Bresnik report to State Commission officials.
Expedition 51 backup crew member Sergey Ryazanskiy signs in for the start of final crew qualification exams.
Expedition 51 backup crew member Randy Bresnik signs in for the start of final crew qualification exams.
Expedition 51 backup crew members Sergey Ryazanskiy and Randy Bresnik pose in front of a Soyuz training mockup.
Expedition 51 backup crew member Sergey Ryazanskiy waits to board a Soyuz training mockup.
Expedition 51 crew member Fyodor Yurchikhin applauds as Jack Fischer signs in for final crew qualification exams.
Expedition 51 crew members Jack Fischer and Fyodor Yurchikhin begin final crew qualification exams.
Expedition 51 crew member Fyodor Yurchikhin prepares to enter a Russian segment systems simulator.
