An astronaut aboard the International Space Station snapped this image as the station flew 265 miles above this cloudy formation in the south Indian Ocean. http://www.nasa.gov/sites/default/files/thumbnails/image/iss059e006522.jpg

In December 2018, an astronaut on the International Space Station took this highly oblique photograph of snow on the eastern Tien Shan and Taklimakan Desert in Central Asia. http://www.nasa.gov/sites/default/files/thumbnails/image/iss057e111453_lrg.jpg

As Glenn Graham, director of Armstrong Flight Research Center's Office of Safety and Mission Assurance flew his T-34 aircraft over California's Antelope Valley, he beheld a once in a lifetime event--a superbloom. http://www.nasa.gov/sites/default/files/thumbnails/image/poppies.jpeg

Astronauts Jim Buchli and Janet Kavandi are inducted into the U.S. Astronaut Hall of Fame Class of 2019 during a ceremony on April 6, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/33674540488_347f845a9d_k.jpg

David Saint-Jacques of the Canadian Space Agency completed the first spacewalk if his career on Monday, April 8, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/saintjacques.jpg

NASA successfully launched the Auroral Zone Upwelling Rocket Experiment or AZURE mission on April 5, 2019, from the Andøya Space Center in Norway. http://www.nasa.gov/sites/default/files/thumbnails/image/aurora_prior_to_launch.jpg

Space Launch System Ascent Testing Advances Understanding of Cargo Configuration http://www.nasa.gov/sites/default/files/thumbnails/image/lrc-2019_h1_p_sls-022204_copy.jpg

America’s powerful new deep space rocket, NASA’s Space Launch System, will face harsh conditions and extreme temperatures in flight when launching NASA’s Orion spacecraft and potential cargo to lunar orbit, and for that, it’ll need strong protection. http://www.nasa.gov/sites/default/files/thumbnails/image/mcf18-0026_1057_lt_to_rt_tangie_gould_courtney_moore.jpg

A Northrop Grumman Antares rocket carrying a Cygnus resupply spacecraft is seen during sunrise on Pad-0A, Tuesday, April 16, 2019, at NASA's Wallops Flight Facility in Virginia. http://www.nasa.gov/sites/default/files/thumbnails/image/33744244598_a8266fedaf_o.jpg

Mission engineers load the final cargo into the Cygnus resupply spacecraft onboard the Northrop Grumman Antares rocket, Tuesday, April 16, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/40659647513_000ebd78f2_k.jpg

A rainbow is seen at launch Pad-0A after the Northrop Grumman Antares rocket launched, Wednesday, April 17, 2019 at NASA's Wallops Flight Facility in Virginia. http://www.nasa.gov/sites/default/files/thumbnails/image/46908739984_40f0f88b9b_k_1.jpg

As the International Space Station orbited 265 miles above the southern Indian Ocean about halfway between Madagascar and Antarctica, the crew snapped this image of the Aurora Australis. http://www.nasa.gov/sites/default/files/thumbnails/image/iss059e021289.jpg

In celebration of the 29th anniversary of the launch of NASA's Hubble Space Telescope on April 24, 1990, astronomers captured an image of the tentacled Southern Crab Nebula. http://www.nasa.gov/sites/default/files/thumbnails/image/southcrab.jpg

Cerberus Fossae is a steep-sided set of troughs cutting volcanic plains to the east of Elysium Mons, Mars. This image was captured by the HiRISE camera on the Mars Reconnaissance Orbiter. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23182.jpg

The International Space Station crew snapped this image of the Hudson Bay's frozen southern tip. http://www.nasa.gov/sites/default/files/thumbnails/image/iss059e028115.jpg

This sparkling burst of stars is Messier 75. It is a globular cluster: a spherical collection of stars bound together by gravity. Clusters like this orbit around galaxies and typically reside in their outer and less-crowded areas, gathering to form dense communities in the galactic suburbs. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1916a.jpg

This final traverse map for NASA's Opportunity rover shows where the rover was located within Perseverance Valley on June 10, 2018, the last date it made contact with its engineering team. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23178.jpg

NASA's InSight lander used the Instrument Deployment Camera (IDC) on the end of its robotic arm to image this sunset on Mars on April 25, 2019, the 145th Martian day, or sol, of the mission. This was taken around 6:30 p.m. Mars local time. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23202_cc_0.jpg

In the late 1950's, NASA scientist Lewis Kaplan developed a groundbreaking way to calculate temperature in the atmosphere for weather forecasting. http://www.nasa.gov/sites/default/files/thumbnails/image/nimbus-iii_1.jpg

NGC 2903 is located about 30 million light-years away in the constellation of Leo (the Lion), and was studied as part of a Hubble survey of the central regions of roughly 145 nearby disk galaxies. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1917a.jpg