Martha Chaffee, widow of Roger Chaffee, Sheryl Chaffee, daughter, and Roger Purvenas, son of Sheryl Chaffee, left, along with acting NASA Administrator Robert Lightfoot, right, place wreaths at the graves of Apollo 1 crewmembers Virgil "Gus" Grissom and Roger Chaffee as part of NASA's Day of Remembrance, Tuesday, Jan. 31, 2017. via NASA http://ift.tt/2jrXp4C

Uranus' moon Miranda is shown in a computer-assembled mosaic of images obtained Jan. 24, 1986, by the Voyager 2 spacecraft. Miranda is the innermost and smallest of the five major Uranian satellites, just 480 kilometers (about 300 miles) in diameter. Nine images were combined to obtain this full-disc, south-polar view. via NASA http://ift.tt/2jBNLIN

Uranus' moon Miranda is shown in a computer-assembled mosaic of images obtained Jan. 24, 1986, by the Voyager 2 spacecraft. Miranda is the innermost and smallest of the five major Uranian satellites, just 480 kilometers (about 300 miles) in diameter. Nine images were combined to obtain this full-disc, south-polar view. via NASA http://ift.tt/2jBNLIN

In a lab at NASA’s Johnson Space Center in Houston, engineers simulated conditions that astronauts in space suits would experience when the Orion spacecraft is vibrating during launch atop the agency’s powerful Space Launch System rocket on its way to deep space destinations. via NASA http://ift.tt/2jmqQmU

The release of the first images today from NOAA’s newest satellite, GOES-16, is the latest step in a new age of weather satellites. This composite color full-disk visible image is from 1:07 p.m. EDT on Jan. 15, 2017, and was created using several of the 16 spectral channels available on the GOES-16 Advanced Baseline Imager (ABI) instrument. via NASA http://ift.tt/2k994lm

The release of the first images today from NOAA’s newest satellite, GOES-16, is the latest step in a new age of weather satellites. This composite color full-disk visible image is from 1:07 p.m. EDT on Jan. 15, 2017, and was created using several of the 16 spectral channels available on the GOES-16 Advanced Baseline Imager (ABI) instrument. via NASA http://ift.tt/2k994lm

Expedition 50 Commander Shane Kimbrough of NASA at work outside the International Space Station on Jan. 13, 2017, in a photo taken by fellow spacewalker Thomas Pesquet of ESA. The two astronauts successfully installed three new adapter plates and hooked up electrical connections for three of the six new lithium-ion batteries on the station. via NASA http://ift.tt/2iDoegW