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. http://www.nasa.gov/sites/default/files/thumbnails/image/32260740536_2866cf4065_o.jpg

A grid of small polygons on the Martian rock surface near the right edge of this view may have originated as cracks in drying mud more than 3 billion years ago. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21263.jpg

The wavemaker moon, Daphnis, is featured in this view, taken as NASA's Cassini spacecraft made one of its ring-grazing passes over the outer edges of Saturn's rings on Jan. 16, 2017. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21056-1041.jpg

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. http://www.nasa.gov/sites/default/files/thumbnails/image/abi_full_disk_low_res_jan_15_2017.jpg

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. http://www.nasa.gov/sites/default/files/thumbnails/image/p1010154.jpg

The JunoCam imager on NASA’s Juno spacecraft snapped this shot of Jupiter’s northern latitudes. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21378.jpg

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. http://www.nasa.gov/sites/default/files/thumbnails/image/9464656357_dcd9554a40_o.jpg

Astronauts, from the left, Gus Grissom, Ed White II and Roger Chaffee stand near Cape Kennedy's Launch Complex 34 during training for Apollo 1 in January 1967. http://www.nasa.gov/sites/default/files/thumbnails/image/s67-19766.jpg

Dione's lit hemisphere faces away from Cassini's camera, yet the moon's darkened surface features are dimly illuminated in this image, due to Saturnshine. http://www.nasa.gov/sites/default/files/thumbnails/image/pia20514-1041.jpg

This panorama, photographed by an astronaut aboard the International Space Station, shows nearly the full length of Lake Powell, the reservoir on the Colorado River in southern Utah and northern Arizona. Note that the ISS was north of the lake at the time, so in this view south is at the top left of the image. http://www.nasa.gov/sites/default/files/thumbnails/image/iss048e073279_lrg.jpg

Dr. George Carruthers, right, and William Conway, a project manager at the Naval Research Institute, examine the gold-plated ultraviolet camera/spectrograph, the first moon-based observatory that Carruthers developed for the Apollo 16 mission. Apollo 16 astronauts placed the observatory on the moon in April 1972. http://www.nasa.gov/sites/default/files/thumbnails/image/hrs_720125-n-zz999-001.jpg

The Calabash Nebula, pictured here is a spectacular example of the death of a low-mass star like the sun. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1705a.jpg

Seen from outside, Enceladus appears to be like most of its sibling moons: cold, icy and inhospitable. http://www.nasa.gov/sites/default/files/thumbnails/image/pia20522-1041.jpg

The Larsen Ice Shelf is situated along the northeastern coast of the Antarctic Peninsula, one of the fastest-warming places on the planet. In the past three decades, two large sections of the ice shelf (Larsen A and B) collapsed. A third section (Larsen C) seems like it may be on a similar trajectory, with a new iceberg poised to break away soon. http://www.nasa.gov/sites/default/files/thumbnails/image/scarinlet_oli_2016006_lrg.jpg

A sunrise photo of Edwards Air Force Base’s Rogers Dry Lake was taken after heavy rainfall in southern California. NASA’s Armstrong Flight Research Center is seen in the foreground. http://www.nasa.gov/sites/default/files/thumbnails/image/afrc2017-0022-01.jpg

Jeanette Scissum joined NASA’s Marshall Space Flight Center in 1964 after earning bachelor's and master's degrees in mathematics from Alabama A&M University. Scissum published a NASA report in 1967, “Survey of Solar Cycle Prediction Models,” which put forward techniques for improved forecasting of the sunspot cycle. http://www.nasa.gov/sites/default/files/thumbnails/image/415205_2.jpg

The Andromeda constellation is one of the 88 modern constellations and should not be confused with our neighboring Andromeda Galaxy. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1706a.jpg

When seen up close, the F ring of Saturn resolves into multiple dusty strands. This Cassini view shows three bright strands and a very faint fourth strand off to the right. http://www.nasa.gov/sites/default/files/thumbnails/image/pia20519.jpg

Pine Island Glacier has shed another block of ice into Antarctic waters. The loss was tiny compared to the icebergs that broke off in 2014 and 2015, but the event is further evidence of the ice shelf’s fragility. http://www.nasa.gov/sites/default/files/thumbnails/image/pineisland_oli_2017026_lrg-crop.jpg

On March 2, 1963 Engineer Thomas Byrdsong checks the Apollo/Saturn 1B Ground-wind-loads model in the Transonic Dynamics Tunnel at Langley Research Center in Hampton, Virginia. http://www.nasa.gov/sites/default/files/thumbnails/image/l-63-385.jpg