Astronomical Twilight

12/31/2024

12/29/2024

Trillions of tons of hydrogen gas are likely buried in rocks and reservoirs beneath Earth's surface, but researchers aren't sure where it is yet.

12/29/2024

We look ahead to 2025 as the sun ramps up its activity, driven by the peak of the current solar cycle.

12/29/2024

2025 EarthSky lunar calendar is available now. A unique and beautiful poster-sized calendar with phases of the moon for every night of the year. Get yours today!

12/29/2024

UPDATE DECEMBER 27: Parker Solar Probe reports success! It survived the world’s closest-ever approach to the sun on Christmas Eve.

12/24/2024

Huge 'Christmas Eve asteroid' the size of a 10-storey building will skim past Earth at 14,743mph on 24 December, NASA warns

https://www.dailymail.co.uk/sciencetech/article-14213885/Christmas-Eve-asteroid-skim-Earth.html?ito=native_share_article-nativemenubutton&fbclid=IwZXh0bgNhZW0CMTEAAR3xhgC55I5NsBPx2o2x013AwVdNGijzg8gObxtidJxyXrcyqgZgK4FTgT0_aem_TRWZALskdMUzburZTwgjqA

Santa won't be the only thing whizzing over our heads this Christmas Eve as NASA warns that an asteroid the size of a ten-story building will make a close pass on December 24.

12/12/2024

Asteroids and Comets

NASA Researchers Discover More Dark Comets

12/12/2024

Did Venus ever have oceans? Was it ever habitable? Previous studies suggest the planet once was more like Earth, with vast stretches of water on its surface. But a new study says no … there were never oceans on Venus. On December 9, 2024, EarthSky’s Dave Adalian sat down with the study’s lead ...

12/12/2024

"My dream would be to see a mission going to a Martian cave or to a Martian lava tube, because one of those caves could be completely pristine from radiation,"

12/12/2024

Scientists at CERN's ALICE detector are replicating conditions found during the Big Bang, attempting to get to the bottom of how matter came to dominate over antimatter.

12/12/2024

Most meteors in annual showers have comets as their sources. But not December’s Geminid meteors, whose source, known as 3200 Phaethon, is a strange hybrid of an asteroid and a comet. This “rock-comet” isn’t icy, like a comet is. But it brightens as it nears the sun, as comets do. And it’s ...

12/12/2024

?????1??????????????2024?12?8?22?34?35??????360fps????(?????)??????????????????????????????????????????????????????? pic.twitter.com/iHUq9EuXQg