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Space
Interstellar comet 3I/ATLAS born in a cold environment
The chemistry of water in interstellar comet 3I/ATLAS indicates that its home star formed in colder conditions compared to that of our sun.
April 26, 2026
Space
New organics on Mars raise questions about life
NASA's Curiosity rover has identified the most diverse collection of organics on Mars ever found. They include some organics never seen before.
April 26, 2026
Sun
Slow solar wind is oddly fast, says Proba-3
Early data from the Proba-3 spacecraft has revealed that slow solar wind travels much faster than expected in the sun's inner corona.
April 26, 2026
Moon Phases
May’s full moon is called the Flower Moon
The May full moon occurs in the the middle of the day on May 1. But it will look full on the nights before and after that. Learn more about the Flower Moon.
April 26, 2026
Sun
Sun news: M flares persist, CMEs nudge Earth
Sun news for April 26, 2026: M flares persist as CMEs nudge Earth. G1 storms are possible today. AR4420 at the central meridian with X-flare potential.
April 26, 2026
Constellations
Crater the Cup sits upon Hydra the Snake’s back
Crater the Cup is a dim constellation that sits on the back of Hydra the Water Snake. You can see Crater best on March, April and May evenings in a dark sky.
April 26, 2026
Space
See great pics of Comet R3 PanSTARRS from our community
Comet R3 PanSTARRS is closest to Earth on April 26. See a cool image from a sun-watching spacecraft, and these fantastic community photos.
April 25, 2026
Earth
Multiday severe weather outbreak forecast for the Plains
We're expecting multiple days of severe weather, including tornadoes, across the Plains and Midwest this weekend and Monday. See threatened areas here.
April 25, 2026
Today's Image
Milky Way season is back! See gorgeous pics here
Enjoy the beauty of our home galaxy in these images from the start of the Milky Way season, thanks to our talented EarthSky community!
April 25, 2026
Constellations
Leo the Lion and its easy to see backward question mark
Leo the Lion - one of the zodiacal constellations - is a prominent fixture from April through June in the evening sky. It’s easy to spot by finding the Sickle.
April 24, 2026
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