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Equatorial plasma bubbles and their effect on air travel
Equatorial plasma bubbles are pockets of low density in the Earth's ionosphere in regions around the equator. They pose risks to aviation. Read more.
January 3, 2025
Mystery dark spot on Enceladus intrigues scientists
Scientists found an unusual dark spot on Enceladus while looking at old images sent back by Cassini. The odd reddish-brown patch faded away over 3 years.
January 2, 2025
Deep-sky photos for December 2024: Editor’s picks
Enjoy this gallery of deep-sky photos for December 2024 from our EarthSky community. If you have a great photo to share, send it in. We love to see them!
January 2, 2025
When you wish upon a star, is it already dead?
Some cynics say that when you wish upon a star, that star is already dead. But don't listen to them! The stars you can see, and your dreams, are perfectly safe.
January 2, 2025
What is the Big Bang?
In the view of modern cosmologists, the Big Bang is the event that marked the birth of our universe. What was it - when was it - and what are modern theories?
January 1, 2025
Sun activity archive for January 2025
Sun activity archive for January 2025. A daily record of flaring, big filaments and prominences, and other sorts of activity, on our local star.
January 1, 2025
Mars starts a new year: avalanches, icy explosions and dunes
A new and explosive year began on Mars on November 14, 2024. NASA and its partners are tracking the season's strange and unique features.
December 31, 2024
Peering down at star-shaped cities from space
Satellites in space give us a clear view of these star-shaped cities in Europe. Read more about these cities, which are hundreds of years old, here.
December 31, 2024
Best stargazing of 2025: Top events not to miss
Get ready for the best stargazing of 2025! Mark your calendar for these observing events. And may we have clear, dark skies for all to enjoy.
December 29, 2024
Black Moon coming on December 30-31
We'll have a Black Moon - the second new moon in a calendar month - overnight from December 30 to 31, 2024. Here's what you'll see that night.
December 29, 2024
