NASA astronaut Christina Koch makes observations from the International space Station's cupola. http://www.nasa.gov/sites/default/files/thumbnails/image/516b8331.jpg

This loose collections of stars, known as an open star cluster, is image 100 of the Caldwell catalog. http://www.nasa.gov/sites/default/files/thumbnails/image/c100-1.jpg

NGC 4258, a galaxy about 23 million light years away, is the site of impressive, ongoing fireworks. http://www.nasa.gov/sites/default/files/m106.jpg

Stars glitter in the night sky above the Earth's atmospheric glow. http://www.nasa.gov/sites/default/files/thumbnails/image/iss061e110462_large.jpg

This smattering of celestial sequins is a spiral galaxy named NGC 4455, located in the northern constellation of Coma Berenices (Berenice’s Hair). This might sound like an odd name for a constellation — and in fact it is somewhat unusual. It’s the only modern constellation named in honor of a real person from history: Queen Berenice II of Egypt. http://www.nasa.gov/sites/default/files/thumbnails/image/potw1952a.jpg

TOI 700 d is the first Earth-size habitable-zone planet discovered by TESS, NASA's Transiting Exoplanet Survey Satellite. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23408.jpg

This artist’s concept illustrates a catastrophic collision between two rocky exoplanets, turning both into dusty debris. http://www.nasa.gov/sites/default/files/thumbnails/image/bd20307_fnl_lynettecook_0.jpg

NASA welcomed 11 new astronauts to its ranks Friday. http://www.nasa.gov/sites/default/files/thumbnails/image/jsc2020e000612.jpg

A multitude of swirling clouds in Jupiter's dynamic North North Temperate Belt is captured in this image from NASA's Juno spacecraft. http://www.nasa.gov/sites/default/files/thumbnails/image/pia22692.jpg

NASA astronauts Nick Hague and Anne McClain talk about their experiences onboard the International Space Station at the Smithsonian National Air and Space Museum in D.C. http://www.nasa.gov/sites/default/files/thumbnails/image/49386279287_04a4852f5b_k.jpg

In the northern Mexican state of Cohuilla lies the Cuatro Cienegas Basin. http://www.nasa.gov/sites/default/files/thumbnails/image/pia23535.jpg

This bright, somewhat blob-like object — seen in this image taken by the NASA/ESA Hubble Space Telescope — is a galaxy named NGC 1803. It is about 200 million light-years away, in the southern constellation of Pictor (the Painter’s Easel), and it was discovered in 1834 by astronomer John Herschel. http://www.nasa.gov/sites/default/files/thumbnails/image/potw2002a.jpg

SpaceX's Falcon 9 rocket lifts off from Launch Complex 39A at the Kennedy Space Center at 10:30 a.m. EST on Jan. 19, 2020. http://www.nasa.gov/sites/default/files/thumbnails/image/ksc-20200119-ph-awg07_0011_large.jpg

The Amidon-Bowen Elementary School choir performs at the MLK Day of Service. http://www.nasa.gov/sites/default/files/thumbnails/image/49421494311_c8b2264dbe_k.jpg

All eyes are on south Mississippi with this month’s delivery and installation of NASA’s Space Launch System. http://www.nasa.gov/sites/default/files/thumbnails/image/s20-005_core_stage_installation_2718.jpg

Spitzer Space Telescope, one of agency’s great observatories, one of Spitzer's great discoveries was that of the TRAPPIST-1 star, an ultra-cool dwarf, which has seven Earth-size planets orbiting it. http://www.nasa.gov/sites/default/files/thumbnails/image/pia21421.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/a1758_lg.jpg

Astronaut and station commander Luca Parmitano is tethered to the International Space Station while finalizing thermal repairs on the AMS. http://www.nasa.gov/sites/default/files/thumbnails/image/iss061e142964_0.jpg

Amy Resnik touches the Space Shuttle Challenger Memorial after a wreath laying ceremony as part of NASA’s Day of Remembrance, Thursday, Jan. 30, 2020, at Arlington National Cemetery. http://www.nasa.gov/sites/default/files/thumbnails/image/49465891157_cd579b94f0_k.jpg

Deborah Johnson has worked for NASA since 1978. http://www.nasa.gov/sites/default/files/thumbnails/image/20200121_jk34134.jpg