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Mercury’s sodium tail is now appearing in special filters
On December 3, 2025, Steven Bellavia imaged Mercury's sodium tail flowing away from the sun. See the image here and read more about Mercury's tail.
December 4, 2025
Did we just see dark matter? Scientists express skepticism
A bold new study claims to have made the 1st ever direct detection of dark matter, but scientists are expressing skepticism.
December 3, 2025
December full moon is the Cold Moon and a supermoon
The 2025 December full moon will occur on December 4. It's also a supermoon, the last supermoon of 2025. It will look very bright. Don't miss it!
December 3, 2025
Most dogs still have a little wolf in them
Scientists found that many dog breeds have some wolf DNA added after wolves were 1st domesticated into dogs about 20,000 years ago.
December 3, 2025
EarthSky’s lunar calendar: How to use this great gift!
Follow the moon! Here’s why you need an EarthSky lunar calendar, the top tips for using it and where you can order one.
December 3, 2025
Orange Aldebaran is Taurus the Bull’s fiery eye
Aldebaran is an enormous star that marks one of the eyes of Taurus the Bull. If placed where our sun is, its surface would pass the orbit of Mercury.
December 3, 2025
New study of dinosaur tracks suggests it walked with a limp
Scientists analyzed the 150-million-year-old footprints of a long-necked sauropod dinosaur and found it might have been limping.
December 2, 2025
7 weird things space does to the human body
Humans are adapted to earthly life. Here are 7 weird things space does to the human body. Knowing these challenges, would you be willing to go to space?
December 2, 2025
Sun activity archive for December 2025
Sun activity archive for December 2025. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
December 1, 2025
Wisdom, oldest bird, returns with mate to Midway Atoll!
Wisdom, a beloved Laysan Albatross, is the oldest known bird. At 75, she returned (with her mate) to Midway Atoll in November 2025 for another breeding season.
November 30, 2025
