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Space
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
Tonight
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!
Astronomy Essentials
Tonight
Visible planets and night sky guide for December
Visible planets and night sky guide. Join EarthSky's Deborah Byrd and John Goss for a video look at December's best night sky sights.
December 3, 2025
Sun
Sun news: NOAA just released a Solar Cycle 25 update
Sun news December 3: NOAA just released its monthly sunspot number for November 2025, indicating that Solar Cycle 25 is continuning to trend downward.
December 3, 2025
Human World
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
Space
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
Brightest Stars
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
Astronomy Essentials
Look for Mercury farthest from the morning sun on December 7
Mercury will reach its greatest elongation - greatest distance from the sun - on December 7, 2025. Look east at dawn. It'll disappear by late December.
December 2, 2025
Earth
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
Spaceflight
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
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