In late June 2013, an exceptional binary containing a rapidly spinning neutron star underwent a dramatic change in behavior never before observed. The pulsar's radio beacon vanished, while at the same time the system brightened fivefold in gamma rays, the most powerful form of light, according to measurements by NASA's Fermi Gamma-ray Space Telescope.
The James Webb Space Telescope is being tested at a number of facilities, including some operated by NASA. One of these locations is in Huntsville, Alabama, at the Marshall Space Flight Center.
Fifteen years ago, NASA's Chandra X-ray Observatory was launched into space aboard the Space Shuttle Columbia. Since its deployment on July 23, 1999, Chandra has helped revolutionize our understanding of the universe through its unrivaled X-ray vision.
Astronomers using the NASA/ESA Hubble Space Telescope have probed the extreme outskirts of the stunning elliptical galaxy Centaurus A.
Today: 5 Progress (55P) Undock: 55P successfully undocked from the ISS at 4:44pm CDT. Progress will remain in orbit for the non-ISS-related "Radar-Progress" experiment. Final deorbit burn is planned for July 31 at 4:54pm CDT.
Saturn appears to Cassini's cameras as a thin, sunlit crescent in this unearthly view. Citizens of Earth, being so much closer to the Sun than Saturn, never get to enjoy a view of Saturn like this without the aid of our robot envoys.
