Astronomy Essentials
2022 December solstice: All you need to know
The 2022 December solstice takes place on December 21. Northern Hemisphere's shortest day. Southern Hemisphere's longest day. Happy solstice to all!
Sun
Sun activity: Fiery limbs on today’s sun
Sun activity for December 3, 2022: Fiery limbs with gorgeous prominences today on the solar disk. New sunspot AR3156. One large coronal hole.
Earth

A moment of global darkness on December 6

For just a moment on December 6, nearly 9 in 10 people worldwide experience nighttime. Read more about the moment of global darkness.
Earth

Historic Keeling Curve data offline after Mauna Loa eruption

The eruption of Mauna Loa has interrupted the historic carbon-dioxide data that measures the Keeling Curve. Read more about the Keeling Curve here.
Space
Spaceflight

Artemis 1 Orion craft has left moon orbit, now headed home

The Artemis 1 Orion moonship left lunar orbit on December 1, and is now headed back to Earth. Splashdown in the Pacific is due December 11.
Tonight

Moon and Jupiter close on December 1

On December 1, 2022, you'll see a bright point of light close to the moon. That's Jupiter! The moon and Jupiter will pair up again at the end of the month.
Astronomy Essentials

Comet 2022 E3 now in morning skies, brightening

Comet 2022 E3 (ZTF) is now in morning skies for the Northern Hemisphere. In early 2023, it should be visible in binoculars. Learn more here.
Today's Image

Saturn’s moon Titan occults star in new images

The European Southern Observatory's Very Large Telescope captured amazing images of Saturn's moon Titan occulting a star on November 29, 2022. See the images.
Earth
Human World

Audubon Christmas Bird Count starts December 14

The Audubon Christmas Bird Count, held each winter, is one of the longest-running community science projects. You can help collect important data about birds.
Spaceflight

SpaceX Starlink launches for December. Watch here

SpaceX’s first Starlink launch for the month is currently scheduled from Florida at 1:29 UTC on December 7, 2022. Watch the livestream here.