The nitrogen ice glaciers on Pluto appear to carry an intriguing cargo: numerous, isolated hills that may be fragments of water ice from Pluto’s surrounding uplands. These hills individually measure one to several miles or kilometers across, according to images and data from NASA’s New Horizons mission. via NASA http://ift.tt/1nPILSw

In this Feb. 3, 1995, image taken onboard space shuttle Discovery on flight day one of the STS-63 mission, astronaut Eileen M. Collins — the first woman to pilot the shuttle — is at the pilot’s station during a “hotfiring” procedure prior to rendezvous with the Russian Mir Space Station. via NASA http://ift.tt/1o6BSMq

Expedition 46 flight engineer Tim Peake of ESA captured this photo on Jan. 29, 2016 from the International Space Station, as the robotic arm in Japan’s Kibo laboratory successfully deployed two combined satellites: AggieSat4 built by Texas A&M University students, and BEVO-2 built by University of Texas students. via NASA http://ift.tt/1PdBVNe

NASA’s Super Guppy aircraft readies to transport an Orion spacecraft from the Michoud Assembly Facility in Louisiana to Kennedy Space Center in Florida. via NASA http://ift.tt/1P9X4be

This self-portrait of NASA’s Curiosity Mars rover shows the vehicle at “Namib Dune,” where the rover’s activities included scuffing into the dune with a wheel and scooping samples of sand for laboratory analysis. via NASA http://ift.tt/1PK1POl

Chuck Resnik, brother of Space Shuttle Challenger astronaut Judith Resnik, left, and NASA Administrator Charles Bolden, right, visit the Space Shuttle Challenger Memorial during a wreath laying ceremony that was part of NASA’s Day of Remembrance on the 30th anniversary of the Challenger accident, January 28, 2016, at Arlington National Cemetery. via NASA http://ift.tt/1OSseWB

NASA’s Orion spacecraft is another step closer to launching on its first mission to deep space atop the agency’s Space Launch System rocket. On Jan. 13, technicians at Michoud Assembly Facility finished welding together the primary structure of the Orion spacecraft destined for deep space, marking another important step on the journey to Mars. via NASA http://ift.tt/1OPBnPJ

Expedition 46 flight engineer Tim Peake of the European Space Agency (ESA) shared this stunning nighttime photograph with his social media followers on Jan. 25, 2016, writing, “Beautiful night pass over Italy, Alps and Mediterranean.” via NASA http://ift.tt/201CFPP

This half-lit view of Enceladus bears a passing resemblance to similar views of Earth’s own natural satellite, but the similarities end there. via NASA http://ift.tt/1UmfrwW

An image from Suomi NPP shows the Eastern United States covered with snow and lit by a blizzard. via NASA http://ift.tt/1PqCo4e