The Earth's solstices come twice a year. For the Northern Hemisphere, this year's winter solstice happens on Dec. 21.

In this image, the COWVR and TEMPEST instruments are shown in the trunk of the cargo craft.

Arianespace's Ariane 5 rocket with NASA’s James Webb Space Telescope onboard, is rolled out to the launch pad, Thursday, Dec. 23, 2021.

This composite image made from seven frames shows the International Space Station, with a crew of seven onboard, in silhouette as it transit...

NASA’s James Webb Space Telescope, or JWST, launched aboard Arianespace's Ariane 5 rocket on Saturday, Dec. 25, 2021.

A United Launch Alliance Atlas V rocket with the Lucy spacecraft aboard is seen at Space Launch Complex 41, Thursday, Oct. 14, 2021.

2021 saw significant milestones achieved in the assembly of NASA’s X-59 Quiet SuperSonic Technology aircraft (QueSST), and all eyes now look...

This image shows knots of cold, dense interstellar gas where new stars are forming.

This image shows the James Webb Space Telescope atop its launch vehicle, but before it was encapsulated in the rocket fairing.

Legendary actor and diplomat, Sidney Poitier, visited JPL in 1979.

Our Milky Way's central black hole has a leak.

Scores of baby stars shrouded by dust are revealed in this infrared image of the star-forming region NGC 2174.