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Space
Universe’s expansion is slowing down, not speeding up
New research suggests we don't live in an rapidly accelerating, expanding universe after all. DESI data suggest the universe's expansion is already slowing.
November 5, 2025
Earth
Sun
Sun news: Double X flares light up the sun!
Sun news November 5, 2025: Solar activity has surged to its highest in weeks after the sun fired off 2 powerful X flares over the past day.
Astronomy Essentials
Super Hunter’s Moon – 2025’s brightest full moon – on November 5-6
Watch for the Super Hunter's Moon - this year's November full moon - on November 5-6, 2025. It's the closest and brightest supermoon of 2025.
November 5, 2025
Earth
Expect high tides, following today’s closest full supermoon
The sun and moon, among other things, affect the height of the tides. Expect higher-than-usual tides for a few days following tonight's full supermoon.
November 5, 2025
Astronomy Essentials
Space
The moon illusion makes the moon look huge!
It's the Super Hunter's Moon tonight. You might see a large-looking moon low in the sky. It's the moon illusion that makes the moon look so big.
November 5, 2025
Earth
Nanotyrannus, a T. rex mini-me, coexisted with the big guys
One of the Dueling Dinosaurs fossils of Montana, which scientists thought was a juvenile T. rex, is actually a new Nanotyrannus species.
November 5, 2025
Astronomy Essentials
Tonight
Visible planets and night sky guide for November
Visible planets and night sky guide. Look for the closest, biggest, brightest moon of the year tonight. And it's a supermoon! Watch our video for more info.
November 5, 2025
Today's Image
See the best deep-sky photos of October 2025 here
Enjoy this gallery of deep-sky photos for October 2025 from our EarthSky community. If you have a great photo to share, send it in, too. We love to see them!
November 5, 2025
Space
Yeast on Mars could survive, unique new research shows
A new study from scientists in India shows that yeast could survive on Mars, tolerating both shockwaves from impacts and toxic perchlorate salts.
November 4, 2025
Moon Phases
Do we all see the same moon phase from Earth?
No matter where you are on the globe, we all see the same moon phase. So why do photos from a distant location sometimes look different from what you're seeing?
November 4, 2025
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