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Webb Telescope launch December 25: Success!
NASA now says that - due to adverse weather - the Webb Telescope will launch no earlier than Christmas Day, December 25.
December 25, 2021
How to catch the elusive green flash
It's not hard to see a green flash with the eye alone, when sky conditions are right, and when you're looking toward a very clear and very distant horizon.
December 25, 2021
Possible fossil spiral arms in our Milky Way
A team of scientists using Gaia data have examined filamentary threads in the disk of the Milky Way and think they might be fossil spiral arms.
December 24, 2021
Scientists find water in Mars’ Grand Canyon
A spacecraft orbiting Mars has made the unexpected discovery of water in Mars' Grand Canyon, otherwise known as Valles Marineris.
December 24, 2021
Top 10 stories of 2021 from EarthSky
The top 10 stories of 2021 is a review of what we've learned in the past year from our home planet, Earth, out to the vast universe.
December 23, 2021
EarthSky’s top photos from 2021
Enjoy EarthSky's top photos from 2021. All these photos were taken by members of the EarthSky community from all around the globe.
December 23, 2021
A nameless grasshopper, found via social media
Old photos on social media helped citizen scientists discover a new species of nameless grasshopper. Its nickname is "the nameless Scaria."
December 22, 2021
Why do pine trees smell good?
Pine trees - as well as spruce and fir, all Christmas tree favorites - produce chemicals called terpenes, giving them their special, distinctive scent.
December 22, 2021
A Mars-sized exoplanet, like Mercury inside
Astronomers have found a nearby, blazing hot, Mars-sized exoplanet. It's like Mercury in composition and orbits its star in only 7.7 hours.
December 20, 2021
Comet Leonard in the evening sky
The first comet to be found in 2021 was Comet Leonard (C/2021 A1). It's now the brightest and best comet of this year! Charts and more here.
December 20, 2021
