A crack on the Antarctic ice shelf grew dramatically in late 2020 into 2021. Scientists are watching to see if the rapidly accelerating crack will cause the shelf to rip apart before Antarctica's sunlit summer season - going on now - comes to an end.

The mission team for NASA's InSight lander called off its attempts to try to dig deeper into Mars with the heat probe known as "the mole." Meanwhile, the rest of the mission gained an extension to December 2022.

FAST's 500-meter (1,640-foot) dish makes it the world's largest single-dish radio observatory. It's expected to open to international observers in 2021.

SpaceX launched 60 more of its Starlink satellites on January 20, 2021. SpaceX ultimately intends to launch tens of thousands of these satellites, to provide global internet access. Here's why astronomers are concerned.

This final test of NASA's SLS megarocket was needed to launch the first uncrewed mission in the Artemis program - Artemis 1 - by the end of 2021. Now the program's schedule is uncertain.

Over the next several evenings - January 19, 20 and 21, 2021 - let the moon show you the red planet Mars, and then use Mars to find the distant ice giant planet, Uranus.

The US Postal Service announced that they'll be releasing a series of stamps highlighting images of the sun captured by NASA's Solar Dynamics Observatory.

Venus has been the "morning star," shining brightly near the horizon just before sunrise. Photographers are capturing pictures in January 2021 and sharing those images with EarthSky.

The surface features of brown dwarfs - objects midway in mass between planets and stars - can't be seen. But researchers have found a way to reveal Jupiter-like stripes and bands in the atmosphere of the closest brown dwarf, Luhman 16B.

Here are some of the space missions to keep an eye out for in 2021.