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Space
Jupiter’s moon slammed and tipped by giant asteroid?
About 4 billion years ago, a huge asteroid - 20 times larger than Earth's dinosaur-killer - struck Jupiter's moon Ganymede and tilted its orientation.
September 5, 2024
Spaceflight
Polaris Dawn to launch Saturday? Many delays so far
Polaris Dawn has faced numerous delays. The Federal Aviation Administration has currently given it a launch window on September 7. Watch here!
September 5, 2024
Sun
Sun news September 5: Active region goes out with a bang
Sun news for September 5: AR3807 is rotating out of view amid moderate activity, with 7 M flares fired over the past day.
September 5, 2024
Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide for September 2024. Look for Mars near planet Jupiter and the stars Castor, Pollux and Betelgeuse.
September 5, 2024
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 5, 2024
Earth
Ancient sea cow was attacked by a crocodile and sharks
The fossil remains of a sea cow from the Miocene Period reveal bite marks that suggest it was attacked by a crocodile and subsequently scavenged by sharks.
September 4, 2024
Earth
Landslide-triggered tsunamis becoming more common
Landslide-triggered tsunamis due to melting glaciers and permafrost are becoming more common with global warming. Read more about Alaska and Greenland.
September 3, 2024
Human World
Sapphire: September birthstone comes in many colors
Sapphire, the September birthstone, is typically blue, the color caused by small amounts of titanium and iron in the crystal structure.
September 3, 2024
Today's Image
Amazing new Mars image! A moon, a volcano, an atmosphere
A new Mars image showcases the moon Phobos, the largest volcano in the solar system, Olympus Mons, and the red planet's thin atmosphere.
September 2, 2024
Space
Direct black hole images that are 50% clearer?
Astronomers with the Event Horizon Telescope Collaboration have developed a new technique that will produce direct black hole images with 50% better resolution.
September 2, 2024
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