Engineers Successfully Test the Parachutes for NASA's Orion Spacecraft at the U.S. Army Yuma Proving Ground http://www.nasa.gov/sites/default/files/thumbnails/image/33204101741_4feb9a2c38_o.jpg

The super star cluster Westerlund 1, only 15,000 light-years away in our Milky Way neighborhood, hosts one of the largest stars ever discovered. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1710a.jpg

Mimas' gigantic crater Herschel lies near the moon's limb in this Cassini view. http://www.nasa.gov/sites/default/files/thumbnails/image/pia20523-1041.jpg

The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite captured this natural-color image of cloud streets over the Barents Sea and Mezhdusharsky Island on March 7, 2017. Such formations occur frequently in the region in late winter. http://www.nasa.gov/sites/default/files/thumbnails/image/barentssea_amo_2017066_lg.jpg

Annie Easley at NASA Glenn Research Center. In 1955, Easley began her career at NASA, then the National Advisory Committee for Aeronautics (NACA), as a human computer performing complex mathematical calculations. http://www.nasa.gov/sites/default/files/thumbnails/image/grc-1981-c-03692.jpg

Annie Easley at NASA Glenn Research Center. In 1955, Easley began her career at NASA, then the National Advisory Committee for Aeronautics (NACA), as a human computer performing complex mathematical calculations. http://www.nasa.gov/sites/default/files/thumbnails/image/grc-1981-c-03692.jpg

This view, acquired on Nov. 7, 2016, by the Operational Land Imager (OLI) on Landsat 8, shows a portion of Canada's Mackenzie River Delta and the town of Inuvik, home to more than 3,000 people. A frozen highway -- 194 kilometers (120 miles) long -- runs between the remote outposts of Inuvik and Tuktoyaktuk along the river’s East Channel. http://www.nasa.gov/sites/default/files/thumbnails/image/mackenzie_oli_2016312_lrg.jpg

On April 15, 2002, STS-110 Mission Specialist Ellen Ochoa works at the Remote Manipulator System controls on the aft flight deck of space shuttle Atlantis. Dr. Ochoa, a veteran astronaut, is currently the 11th director of Johnson Space Center. She became the first Hispanic woman to go to space when she served on the STS-56 mission. http://www.nasa.gov/sites/default/files/thumbnails/image/29623539086_d48a0b301f_o.jpg

Hubble spots two interacting galaxies some 60 million light-years away in the constellation of Leo. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1712a.jpg

This enhanced-color image of a mysterious dark spot on Jupiter seems to reveal a Jovian “galaxy” of swirling storms. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21386.jpg

Flight Engineer Thomas Pesquet of ESA is seen floating outside the International Space Station during a spacewalk. Pesquet and Expedition 50 Commander Shane Kimbrough of NASA conducted the six-hour-and-34-minute spacewalk on March 24, 2017. A second spacewalk, by Kimbrough and NASA astronaut Peggy Whitson, is scheduled for Thursday, March 30. http://www.nasa.gov/sites/default/files/thumbnails/image/33531796282_85801ec9ef_o.jpg

The mound in the center of this Mars Reconnaissance Orbiter image appears to have blocked the path of the dunes as they marched south (north is to the left in this image) across the scene. Smaller dunes run perpendicular to some of the larger-scale dunes, probably indicating a shift in wind directions in this area. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21572.jpg

The Pressurized Mating Adapter-3 (PMA-3) is in the grip of the International Space Station's Canadarm2 robotic arm during its relocation and attachment to the station's Harmony module on March 26,2017. A spacewalk by NASA astronauts Shane Kimbrough and Peggy Whitson, which began at 7:29 a.m., will finalize the PMA-3 cable connections on Harmony. http://www.nasa.gov/sites/default/files/thumbnails/image/iss050e060267.jpg

Dr. Nancy Grace Roman is shown with a model of the Orbiting Solar Observatory (OSO) in 1962. She was the first Chief of Astronomy in the Office of Space Science at NASA Headquarters and the first woman to hold an executive position at NASA. She had oversight for the planning and development of programs including the Hubble Space Telescope. http://www.nasa.gov/sites/default/files/thumbnails/image/7538840276_f987be0cb7_o.jpg

Although only a sliver of Saturn's sunlit face is visible in this view, the mighty gas giant planet still dominates the view. http://www.nasa.gov/sites/default/files/thumbnails/image/pia20530.jpg

This illustration shows NASA's Cassini spacecraft about to make one of its dives between Saturn and its innermost rings as part of the mission's grand finale. Cassini will make 22 orbits that swoop between the rings and the planet before ending its mission on Sept. 15, 2017, with a final plunge into Saturn. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21439.jpg

A horse drawn caisson carries former astronaut and U.S. Senator John Glenn to his final resting place during the interment ceremony at Arlington National Cemetery on Thursday, April 6, 2017, in Virginia. Glenn was the first American to orbit Earth on Feb. 20, 1962, in a five-hour flight aboard the Friendship 7 spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/33878889975_d79379ae7f_o.jpg

This image, taken by the JunoCam imager on NASA’s Juno spacecraft, highlights a feature on Jupiter where multiple atmospheric conditions appear to collide. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21338.png

The Soyuz MS-02 spacecraft is seen as it lands with Expedition 50 Commander Shane Kimbrough of NASA and Flight Engineers Sergey Ryzhikov and Andrey Borisenko of Roscosmos near the town of Zhezkazgan, Kazakhstan on Monday, April 10, 2017 (Kazakh time). http://www.nasa.gov/sites/default/files/thumbnails/image/33110046934_8e3808871c_o.jpg

Through NASA's Space Technology Research Fellowship (NSTRF) program, a fresh approach to designing and manufacturing heat-thwarting thermal protection systems - or heatshields - for spacecraft is being developed and tested, offering the promise of fabricating larger tile sizes while reducing labor, cost and waste. http://www.nasa.gov/sites/default/files/thumbnails/image/strg_nstrf_edl_visualization_joe_brock2_0.jpg