On Saturday, May 30, 2020, a SpaceX Falcon 9 rocket carrying the company's Crew Dragon spacecraft is launched on NASA’s SpaceX Demo-2 mission to the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/49957474237_63b71f73c4_k_0.jpg

A small glacier in the Arctic region of Norwegian archipelago Svalbard, as photographed by NASA's Airborne Tropical Tropopause Experiment (ATTREX). http://www.nasa.gov/sites/default/files/thumbnails/image/svalbardglacier-16.jpg

The samples Apollo 11 brought back to Earth from the Moon were humanity's first from another celestial body. The upcoming Perseverance rover mission will collect the first samples from another planet. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23919-1041.jpg

Lightning flashes from a storm cloud to strike the ground. Such bolts represent only a small part of the overall phenomenon of lightning. http://www.nasa.gov/sites/default/files/thumbnails/image/3_iss057e055409.jpg

The stars of the globular cluster NGC 6441 sparkle peacefully in the night sky, about 13,000 light-years from the Milky Way’s galactic center. http://www.nasa.gov/sites/default/files/thumbnails/image/potw2022a.jpg

Exquisite layering is revealed emerging from the sand in southern Holden Crater. Sequences like these offer a window into Mars' complicated geologic history. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23952.jpg

Japan's resupply ship, the H-II Transfer Vehicle-9 (HTV-9), is pictured attached to the International Space Station's Harmony module. http://www.nasa.gov/sites/default/files/thumbnails/image/iss063e024519.jpg

Like a wisp of green smoke, the aurora australis seemingly intersects with the Earth's airglow as the International Space Station orbited above the Indian Ocean halfway between Australia and Antarctica. http://www.nasa.gov/sites/default/files/thumbnails/image/iss063e025120.jpg

This illustration imagines the view from NASA's Cassini spacecraft during one of its final dives between Saturn and its innermost rings. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22768.jpg

Looking deep into the universe, the Hubble Space Telescope catches a passing glimpse of the numerous arm-like structures that sweep around this barred spiral galaxy, known as NGC 2608. Appearing as a slightly stretched, smaller version of our Milky Way, the peppered blue and red spiral arms are anchored together by the prominent horizontal http://www.nasa.gov/sites/default/files/thumbnails/image/potw2023a.jpg

Launched on April 20, 2004, Gravity Probe B (GP-B) was a collaboration between Stanford University and NASA designed to test two previously untested aspects of Albert Einstein’s general theory of relativity. http://www.nasa.gov/sites/default/files/thumbnails/image/gpb.jpg

Seen here in incredible detail is the starburst galaxy formally known as PLCK G045.1+61.1. The galaxy, which appears as multiple reddish dots near the center of the image, is being gravitationally lensed by a cluster of closer galaxies, also seen in the image. http://www.nasa.gov/sites/default/files/thumbnails/image/potw2024a_0.jpg

This artist's concept shows an astronaut on Mars, as viewed through the window of a spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23900.jpg

Pilots Troy Asher and Wayne Ringelberg walk out of NASA’s Armstrong Flight Research Center’s (AFRC) hangar in Palmdale, California, toward the flight line. http://www.nasa.gov/sites/default/files/thumbnails/image/afrc2020-0063-15_orig.jpg

Pilots Troy Asher and Wayne Ringelberg walk out of NASA’s Armstrong Flight Research Center’s (AFRC) hangar in Palmdale, California, toward the flight line. http://www.nasa.gov/sites/default/files/thumbnails/image/afrc2020-0063-15_orig.jpg

Astronomers have discovered evidence for thousands of black holes located near the center of our Milky Way galaxy using data from NASA's Chandra X-ray Observatory. http://www.nasa.gov/sites/default/files/thumbnails/image/sgra_swarm_lg.jpg

NASA astronauts (from top) Chris Cassidy and Bob Behnken work on U.S. spacesuits. http://www.nasa.gov/sites/default/files/thumbnails/image/iss063e030609.jpg

In this image NGC 7027 resembles a jewel bug, an insect with a brilliantly colorful metallic shell. http://www.nasa.gov/sites/default/files/thumbnails/image/stsci-h-p2031d-f-1764x1249.png

On June 21, 2020, as the International Space Station orbited over Kazakhstan and into China, an external high-definition camera captures this picture of the solar eclipse shadowing a portion of the Asian continent. http://www.nasa.gov/sites/default/files/thumbnails/image/iss063e031761.jpg

This composite image, made from six frames, shows the International Space Station, with a crew of five onboard, in silhouette as it transits the Sun. http://www.nasa.gov/sites/default/files/thumbnails/image/50041214891_87bdab628c_o.jpg

We don’t see the beautiful spiral arms of galaxy NGC 5907 in this Hubble image because we are viewing it edge-on, like looking at the rim of a plate. It is for this reason that NGC 5907 is also known as the Knife Edge galaxy. http://www.nasa.gov/sites/default/files/thumbnails/image/potw2025a.jpg