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Space
Brown dwarf population doubles to more than 6,000
Volunteers combing through years of space images have made discoveries that double the brown dwarf population. And you can join in the search!
May 13, 2026
Earth
When the asteroid killed the dinosaurs: Blow-by-blow account
What happened when the asteroid killed the dinosaurs some 66 million years ago? Read a blow-by-blow account of what the dinosaurs underwent.
May 13, 2026
Sun
Sun news: A huge coronal hole is now facing Earth
Sun news May 13, 2026: A large coronal hole is now facing Earth. The fast solar wind it produces may start reaching us on May 15.
May 13, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for May
Visible planets and night sky guide. Tomorrow before sunrise, the thin waning crescent moon will hang close to faint Mars, with brighter Saturn nearby.
May 13, 2026
Space
Built not born: Huge black holes form in mergers, study says
A new study suggests the largest stellar-mass black holes form not from single stars collapsing, but from collisions and mergers between smaller black holes.
May 12, 2026
Space
Nearby super-Earth is super-hot and airless
The Webb space telescope observed nearby super-Earth LHS 3844 b. It found it blazingly hot and airless, close to its star.
May 12, 2026
Brightest Stars
Polaris is the present-day North Star of Earth
Many people think Polaris is the brightest star, but it's only 48th in brightness. Still, Polaris is famous because the entire northern sky wheels around it.
May 12, 2026
Human World
Pentagon UFO files released: Views from the moon and more
On May 8, 2026, the U.S. Pentagon released its 1st batch of Pentagon UFO files. They include some from Apollo moon missions 11, 12 and 17.
May 10, 2026
Constellations
Tonight
How to see the Northern Crown (Corona Borealis)
Corona Borealis, the Northern Crown, is an almost-perfect semicircle of stars. Learn to find it and identify its brightest star, and about its mythology.
May 10, 2026
Today's Image
See the best Milky Way photos of 2026 here
See 10 of the best Milky Way photos from across the globe, from the 2026 Milky Way Photographer of the Year contest, sponsored by Capture the Atlas.
May 10, 2026
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