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Earth
Sun
Sun news: Sun eruptions, plus Mercury!
Sun news September 13, 2025. The quiet sun hurled a huge filament & a jet-like prominence. Possible auroras this weekend as coronal hole & CME effects arrive.
September 13, 2025
Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide. Chi Cygnid meteor shower reaches its peak. Mercury is going behind the sun, and the moon's last quarter phase is tomorrow.
Space
Black hole stars could solve early universe puzzle
Astronomers have proposed black hole stars to explain the mysterious little red dots that Webb has seen in the early universe.
September 12, 2025
Earth
International Cloud Appreciation Day is September 12
The international Cloud Appreciation Day is September 12, 2025. Learn how to participate here and see a gallery of beautiful clouds.
September 12, 2025
Space
Exoplanet TRAPPIST-1e: New hints of a habitable world?
The 1st analysis results from the Webb space telescope indicate that exoplanet TRAPPIST-1e might have an atmosphere of nitrogen and methane.
September 12, 2025
Clusters Nebulae Galaxies
The Andromeda galaxy: All you need to know
The Andromeda galaxy is the closest big galaxy to our Milky Way. At 2.5 million light-years, it's the most distant thing you can see with the eye alone.
September 12, 2025
Space
How interstellar object 3I/ATLAS came to us
Researchers have traced the path interstellar object Comet 3I/ATLAS back 10 million years, looking for its origin or close encounters with other stars.
September 11, 2025
Space
NASA announces Mars rock as a potential biosignature
NASA said at a press conference on September 10, 2025, that a Mars rock explored by the Perseverance rover is a potential biosignature.
September 11, 2025
Earth
Fall hummingbird migration in progress across North America
The fall hummingbird migration typically lasts from August through October. Spot the birds in every U.S. state and Canadian province as they travel south.
September 11, 2025
Space
Do organics in Enceladus’ plumes really come from its ocean?
Scientists have thought the organics in Enceladus' plumes originate in its ocean. A new study suggests at least some of them might be formed by radiation.
September 11, 2025
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