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Why are Mars’ polar caps different from each other?
Mars' polar caps are generally similar, but they also differ in some some ways. A new study shows how the differing sublimation of CO2 ice plays a role.
September 13, 2024
Question mark galaxy? Gravity lens creates cosmic graffiti
An unusual occurrence of gravitational lensing created this view of a question mark galaxy. The discovery reveals details about early galactic evolution.
September 13, 2024
Jupiter’s moon Io has a new volcano! See pics here
Jupiter's moon Io has a new volcano! The volcano appears in Juno spacecraft images from February 2024. Streams of lava and sulfur stains mark its flanks.
September 12, 2024
Watch a star’s surface bubble in fantastic video and images
For the 1st time, astronomers have watched a star's surface bubble in magnificent detail. The bubbling is hot gases on a star 178 light-years away.
September 12, 2024
A buddy for Betelgeuse? Does this mean no supernova?
A recently-published study suggests the red giant star Betelgeuse may have a sun-size companion which might affect the star's brightness and variability.
September 10, 2024
LIVE on Monday: Moon crazy, with Robert Reeves
Join us from 12:15 CDT (17:15 UTC) on Monday, September 9, 2024, as lunar astrophotographer Robert Reeves discusses ways to appreciate our moon.
September 8, 2024
Moon’s volcanoes were erupting only 120 million years ago
Scientists in China, studying samples brought back by the Chang’e-5 mission, say that the moon's volcanoes were active as recently as 120 million years ago.
September 8, 2024
How asteroid Phaethon can spawn the Geminid meteors
Phaethon is a weird asteroid that behaves like a comet. It's also responsible for the Geminid meteor shower. Find out how it does so, here.
September 6, 2024
Small asteroid hit over the Philippines on September 5
A small asteroid harmlessly hit Earth's atmosphere above the northern Philippines around 16:39 UTC on September 5, 2024. Watch the videos of the event here!
September 5, 2024
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
