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Human World
No leap second for December 31, 2021
World timekeepers have decreed there will be no leap second on December 31, 2021. Overall the spin of Earth is slowing down, but in 2020 it sped up.
December 31, 2021
Astronomy Essentials
The star Sirius rings in the New Year
The Dog Star Sirius reaches its highest point in the sky around midnight every New Year's Eve. For this reason, it could also be called the New Year's star.
December 31, 2021
Today's Image
December’s deep sky: Photos of the Spaghetti Nebula and more
Amazing astrophotographers in the EarthSky community shared their photos of December's deep sky with us, including the Spaghetti Nebula and galaxies.
December 31, 2021
Space
Huge asteroid will pass Earth safely January 18
A huge asteroid will pass Earth on January 18, 2022. The asteroid poses no threat to Earth and at its closest will be five times farther than the moon.
December 30, 2021
Space
2022 Quadrantid meteor shower to peak January 2-3
The Quadrantid meteor shower in 2022 coincides with a new moon, meaning there will be dark skies and a better chance of spotting meteors.
December 29, 2021
Astronomy Essentials
EarthSky’s meteor shower guide for 2022
EarthSky's annual meteor shower guide gives you the information you need to enjoy a year's worth of meteors. Start with the Quadrantids in January.
December 29, 2021
Astronomy Essentials
Best of 2022: Night sky scenes not to miss
Best of 2022: Night sky scenes chosen for you by the editors of EarthSky that you won't want to miss. Mark your calendars now!
December 29, 2021
Today's Image
10 best northern lights photos of 2021
The blog “Capture the Atlas” announced its 2021 Northern Lights Photographer of the Year contest. You can see 10 of the best aurora photos in the world here.
December 28, 2021
Sun
Space weather: Your 5 questions answered
NASA answers 5 questions about space weather, from what does it do to Earth and how is it monitored to how can we prepare.
December 28, 2021
Space
Updates on Webb Telescope’s long journey to L2
The James Webb Space Telescope will take about a month to unfurl as it travels to L2. Some are calling it Webb's "30 days of terror."
December 28, 2021
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