NASA astronaut Nick Hague is seen outside the Soyuz MS-12 spacecraft after he landed in a remote area near the town of Zhezkazgan, Kazakhstan. http://www.nasa.gov/sites/default/files/thumbnails/image/48836217723_ad164e610d_k.jpg

Cosmologist Stephen Hawking changed our view of the universe with his remarkable theories and outreach even thought he suffered from ALS, which slowly paralyzed him over the years. http://www.nasa.gov/sites/default/files/thumbnails/image/3462939243_8986257667_o.jpg

After completing the first of 10 spacewalks to upgrade the station, astronaut Christina Koch, wrote: The great @Space_Station battery swap series of spacewalks is underway! http://www.nasa.gov/sites/default/files/thumbnails/image/egr-xqtw4aez5m2.jpg

Spitzer Space Telescope's infrared cameras penetrate much of the dust, revealing the stars of the crowded galactic center region of our Milky Way. http://www.nasa.gov/sites/default/files/thumbnails/image/ssc2006-02a_0.jpg

NASA’s X-59 QueSST, an experimental piloted aircraft designed to fly faster than sound without producing the annoying – if not alarming – sonic booms of previous supersonic aircraft is taking shape.. http://www.nasa.gov/sites/default/files/thumbnails/image/flying_004_0.jpg

NASA’s X-59 QueSST, an experimental piloted aircraft designed to fly faster than sound without producing the annoying – if not alarming – sonic booms of previous supersonic aircraft is taking shape.. http://www.nasa.gov/sites/default/files/thumbnails/image/flying_004_0.jpg

NASA’s X-59 QueSST, an experimental piloted aircraft designed to fly faster than sound without producing the annoying – if not alarming – sonic booms of previous supersonic aircraft is taking shape.. http://www.nasa.gov/sites/default/files/thumbnails/image/flying_004_0.jpg

NASA astronaut Dr. Serena Auñón-Chancellor speaks about her experience on Expeditions 56 and 57 onboard the International Space Station (ISS) at Excel Academy Public Charter School, Monday, June 10, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/48039478643_e949ff3145_k.jpg

NASA astronaut Dr. Serena Auñón-Chancellor speaks about her experience on Expeditions 56 and 57 onboard the International Space Station (ISS) at Excel Academy Public Charter School, Monday, June 10, 2019. http://www.nasa.gov/sites/default/files/thumbnails/image/48039478643_e949ff3145_k.jpg

Amy Ross, a spacesuit engineer at Johnson Space Center, NASA Administrator Jim Bridenstine, watch as Kristine Davis and Dustin Gohmert wear prototype spacesuits. http://www.nasa.gov/sites/default/files/thumbnails/image/48905773692_0b981d9b02_k_0.jpg

NASA astronaut Christina Koch works while tethered near the Port 6 truss segment of the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/iss061e005311.jpg

In 1572, Danish astronomer Tycho Brahe was among those who noticed a new bright object in the constellation Cassiopeia. http://www.nasa.gov/sites/default/files/thumbnails/image/tycho.jpg

NASA astronaut Christina Koch conducts her fourth spacewalk at the International Space Station with fellow NASA astronaut Jessica Meir http://www.nasa.gov/sites/default/files/thumbnails/image/iss061e008880.jpeg

Vice President Mike Pence delivers remarks during the opening ceremony of the 70th International Astronautical Congress. http://www.nasa.gov/sites/default/files/thumbnails/image/48936697326_123e0925c3_k.jpg

Engineers and technicians at NASA’s Michoud Assembly Facility in New Orleans have structurally mated the first of four RS-25 engines to the core stage for NASA’s Space Launch System (SLS) rocket that will help power the first Artemis mission to the Moon. http://www.nasa.gov/sites/default/files/thumbnails/image/maf_20191021_p_rs-25_engine_install_reveal-62.jpg

The Medusa merger, was not always one entity, but two. An early galaxy consumed a smaller gas-rich system, throwing out streams of stars and dust into space. These streams resemble the writhing snakes that Medusa, a monster in ancient Greek mythology, famously had on her head in place of hair, lending the object its intriguing name. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1939a.jpg

Astronomers using data from NASA’s Chandra X-ray Observatory and other telescopes have put together a detailed map of a rare collision between four galaxy clusters. http://www.nasa.gov/sites/default/files/thumbnails/image/abell1758.jpg

This image of star trails was compiled from time-lapse photography taken by NASA astronaut Christina Koch while onboard the International Space Station. http://www.nasa.gov/sites/default/files/thumbnails/image/startrailtimelapse_lrg.jpg

A Northrop Grumman Antares rocket is seen as it rolls out to Pad-0A, Tuesday, Oct. 29, 2019, at NASA's Wallops Flight Facility in Virginia. http://www.nasa.gov/sites/default/files/thumbnails/image/48980275608_dec6675aae_k.jpg

From the vantage point of space aboard the International Space Station, NASA astronaut Andrew Morgan captured this image of a California wildfire. http://www.nasa.gov/sites/default/files/thumbnails/image/461c5671.jpg