This mosaic, taken by the Mars Curiosity rover, looks uphill at Mount Sharp. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22313.jpg

TESS, the Transiting Exoplanet Survey Satellite, is the next step in the search for planets outside of our solar system, including those that could support life. http://www.nasa.gov/sites/default/files/thumbnails/image/tess_with_techs_4000.jpg

Inside the Astrotech processing facility at Vandenberg Air Force Base, NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, or InSight, Mars lander is tested ahead of its scheduled launch on May 5, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/insight.jpg

Before there were computers and software that could stitch together digital images, they were printed on photo paper, trimmed by hand, and taped in place on a large black board. http://www.nasa.gov/sites/default/files/thumbnails/image/29177231106_5186f7024e_o.jpg

NASA astronaut Drew Feustel seemingly hangs off the International Space Station while conducting a spacewalk on March 29, 2018. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e006321.jpg

Aeronautical innovations are part of a government-industry partnership to collect data that could make supersonic flight over land possible, dramatically reducing travel time in the United States. http://www.nasa.gov/sites/default/files/thumbnails/image/lbfd-vehicle2.jpg

Gullies on Martian sand dunes, like these in Matara Crater, have been very active, with many flows in the last ten years. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22349.jpg

These graceful arcs are a cosmic phenomenon known as an Einstein ring - created as the light from distant galaxies warps around an extremely large mass, like a galaxy cluster. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1814a.jpg

Attendees talk with NASA staff at exhibit booths during Sneak Peek Friday at the USA Science and Engineering Festival, Friday, April 6, 2018. At the festival, NASA showcased the future of human space exploration – including the Orion spacecraft and the Space Launch System rocket. http://www.nasa.gov/sites/default/files/thumbnails/image/40567056184_826fbb12df_o.jpg

From March 20-23, 2018, the Solar Dynamics Observatory captured a series of images of our Sun and then ran together three sequences in three different extreme ultraviolet wavelengths. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22360.jpg

Auroras are one of the many Earthly phenomena the crew of the International Space Station observe from their perch high above the planet. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e014528.jpg

The worlds orbiting other stars are called “exoplanets,” and they come in a wide variety of sizes, from gas giants larger than Jupiter to small, rocky planets about as big around as Earth or Mars. This rocky super-Earth is an illustration of the type of planets future telescopes, like NASA's TESS, hope to find outside our solar system. http://www.nasa.gov/sites/default/files/thumbnails/image/superearth20180412-16.jpg

Astronauts aboard the International Space Station captured this photo while flying over the western United States. The wide field of view stretches from the Sierra Nevada of California to the Columbia Plateau of Oregon and the Snake River Valley of Idaho. Lake Tahoe is nestled on the border of California and Nevada. http://www.nasa.gov/sites/default/files/thumbnails/image/iss055-e-1038_lrg.jpg

The Colorado High-resolution Echelle Stellar Spectrograph, or CHESS 4, was successfully launched on a NASA Black Brant IX sounding rocket at 12:47 p.m. EDT, April 16 (4:47 a.m. local, April 17) from the Kwajalein Atoll in The Republic of the Marshall Islands. http://www.nasa.gov/sites/default/files/thumbnails/image/chess_launch_wff-2018-015-384.jpg_.jpg

This colorful image, taken by NASA’s Hubble Space Telescope, celebrates the Earth-orbiting observatory’s 28th anniversary of viewing the heavens, giving us a window seat to the universe’s extraordinary stellar tapestry of birth and destruction. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p1821a-m-1699x2000.png

Saturn’s rings display their subtle colors in this view captured on Aug. 22, 2009, by NASA’s Cassini spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22418-1041.jpg

As our nearest star, the Sun bathes Earth in a steady stream of energetic particles, magnetic fields and radiation that can stimulate our atmosphere and light up the night sky, like the aurora borealis, or northern lights. http://www.nasa.gov/sites/default/files/thumbnails/image/northamerica_vir_2018111_lrg.jpg

NASA astronaut Ricky Arnold captured this clear view of Mount Rainier National Park as the International Space Station orbited above, sharing the image with his followers on April 25 to celebrate National Park Week. http://www.nasa.gov/sites/default/files/thumbnails/image/dbpbyitxcaa5ttg.jpg_orig.jpg

Greece and the Aegean and Ionian Seas http://www.nasa.gov/sites/default/files/thumbnails/image/iss055e008381.jpg

NASA's Operation IceBridge successfully collected data over several glaciers, research sites, and some parallel coastal grid lines on April 26, 2018, as part of its Spring 2018 campaign. http://www.nasa.gov/sites/default/files/thumbnails/image/valley.jpg