Sign Up for Our Amazing Newsletter!
A daily update by email. Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Sun
Sun news: Powerful M6 flare caps day of high activity
Sun news for April 27, 2026: M6 flare erupts from AR4420! Four M flares in 24 hours. CME analysis ongoing. G1 storms possible late April 29.
April 27, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for April and May
Visible planets and night sky guide. This week, look eastward in the evening for the gibbous moon near the bright star Spica. The moon is waxing toward full.
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
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
Subscribe now! A daily update with Science news, great photos, sky alerts.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Space
View All
Astronomy Essentials
View All
Earth
View All
Human World
View All
