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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
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
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
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
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
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
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
The Trifid Nebula highlights Hubble’s 36th anniversary
It's the Hubble Space Telescope's 36th anniversary! To celebrate, NASA has released an image of the iconic Trifid Nebula. Watch a video here.
April 24, 2026
What are coronal mass ejections? Big burps of sun-stuff!
Coronal mass ejections (CMEs) are powerful eruptions on the sun that can disrupt electrical systems and produce brilliant auroral displays on Earth.
April 24, 2026
Join the worldwide 2026 City Nature Challenge this weekend!
This weekend, April 24-27, 2026, join the global City Nature Challenge and record the biosphere in your neighborhood to help track real-time change.
April 24, 2026
