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Sun
Sun news: Bam! M3.0 flare from newcomer sunspot
Sun news September 3, 2026: Bam! Newcomer AR4524 fired an M3.0 flare from the northeast limb. Its CME will miss Earth, but this region is one to watch.
September 3, 2026
Constellations
Corona Australis is the sparkling Southern Crown
Corona Australis is a dim constellation lying below the Teapot asterism of Sagittarius. Its sparkling, curving shape befits its name.
September 3, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide: Watch a livestream with Deborah Byrd today at noon CDT. Find out about 5 September sky sights you won’t want to miss!
September 2, 2026
Space
Roman space telescope has launched! You can adopt a pixel
The Nancy Grace Roman Space Telescope launched on August 30 from the Kennedy Space Center. Want to add your name to a pixel? Find out how here!
September 2, 2026
Earth
Lake Powell hits record low, continues to drop
Lake Powell has hit its lowest level ever. Despite the monsoons, like the flash floods that hit Grand Canyon over the weekend, water levels continue to drop.
September 2, 2026
Brightest Stars
Fomalhaut is the Loneliest Star once again
Fomalhaut is known as the Loneliest Star because it shines brightly in a dim patch of sky. Saturn joined it in recent years, but is now pulling away.
September 2, 2026
Earth
Will fall migration bring a billion bird night?
Will we see a billion bird night during fall migration this year? And get tips on how you can help birds by turning off exterior lights.
September 2, 2026
Space
How do lava-world exoplanets keep their atmospheres?
A new study from researchers at Stanford University helps explain how hot lava-world exoplanets orbiting close to their stars can maintain their atmospheres.
September 1, 2026
Earth
Will El Niño become supersized? What experts are saying
El Niño is here. But will it become supersized? NOAA says there's a 90% or greater chance for El Niño to become "very strong" between September and January.
September 1, 2026
Space
Pioneer 11: Watching the Saturn Watchers
Pioneer 11 made history 47 years ago today when it became the 1st spacecraft to fly past Saturn, revealing the ringed world up close for the 1st time.
September 1, 2026
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