This cosmic kaleidoscope of purple, blue and pink marks the site of two colliding galaxy clusters.
Alluvial fans are gently-sloping wedges of sediments deposited by flowing water. Some of the best-preserved alluvial fans on Mars are in Saheki Crater, an area that has been imaged many times previously.
A United Launch Alliance Atlas V rocket carrying Orbital ATK's Cygnus spacecraft on a resupply mission to the International Space Station lifts off from Space Launch Complex 41 on Cape Canaveral Air Force Station in Florida at 11:05 p.m. EDT on March 22, 2016.
The Cygnus spacecraft sits on top of an Atlas V rocket ready for launch to the International Space Station on March 22, 2016.
A new map of Mars' gravity is the most detailed to date, providing a revealing glimpse into the planet's hidden interior. The map was derived using Doppler and range tracking data collected by NASA's Deep Space Network from three NASA spacecraft in orbit around Mars: Mars Global Surveyor, Mars Odyssey, and the Mars Reconnaissance Orbiter.
A Soyuz rocket lifts off from rom the Baikonur Cosmodrome in Kazakhstan on March 19, (March 18 U.S. time) carrying Expedition 47 to the International Space Station.
The gantry arms close around the Soyuz TMA-20M spacecraft to secure the rocket, as seen in this long exposure photograph taken on Wednesday, March 16, 2016 at launch pad 1 at the Baikonur Cosmodrome in Kazakhstan. Launch of the Expedition 47 crew is scheduled for 5:26 p.m. EDT Friday, March 18.
This image of haze layers above Pluto’s limb was taken by the Ralph/Multispectral Visible Imaging Camera (MVIC) on NASA’s New Horizons spacecraft. About 20 haze layers are seen; the layers have been found to typically extend horizontally over hundreds of kilometers, but are not strictly parallel to the surface.