This artist's concept shows NASA's Mars orbiters lining up behind the Red Planet for their "duck and cover" maneuver to…
On Oct. 7, NASA astronaut Reid Wiseman and European Space Agency astronaut Alexander Gerst completed the first of three spacewalks…
EXPRESS Rack 1 is pictured on-orbit May 14, 2001, with astronaut James Voss during Expedition 2.
European Space Agency astronaut Alexander Gerst, Expedition 41 flight engineer, uses a digital still camera to expose a photo of…
Dryden used an F/A-18 Hornet fighter aircraft as its Systems Research Aircraft (SRA). A primary objective was to identify and…
High-energy X-rays streaming from a rare and mighty pulsar (magenta), the brightest found to date, can be seen in this…
NASA astronaut Scott Kelly, wearing an Extravehicular Mobility Unit (EMU) spacesuit.
Lithuanian Prime Minister Algirdas Butkevičius visited NASA Headquarters in Washington, DC Monday, Oct. 6, 2014 to witness the signing of…
The galaxy Messier 82 (M82) is seen here in two different lights. A visible-light view from NASA's Hubble Space Telescope…
This chart illustrates the relative masses of super-dense cosmic objects, ranging from white dwarfs to the supermassive black holes encased…
