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Earth
Today's Image
Hurricane triplets spin across the Pacific Ocean
Rare hurricane triplets are currently spinning across the Pacific Ocean: Lowell, Karina and Marie. Did El Niño play a part? Find out here.
September 3, 2026
Space
BepiColombo mission 1 step closer to Mercury today
The BepiColombo mission has been maneuvering its way into orbit around Mercury for 8 years. On September 3, it will release 2 orbiters in Mercury orbit.
September 3, 2026
Space
Giant mega-Earth is 23 times more massive than Earth
Astronomers have discovered a new giant mega-Earth exoplanet that is a whopping 23 times as massive as Earth and 2.5 times its diameter.
September 3, 2026
Sun
Sun news: Big 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
Astronomy Essentials
Tonight
Visible planets and night sky guide for September
Visible planets and night sky guide: Jupiter is back, and the waning gibbous moon hangs near the Pleiades. Watch a video about September's best sky sights.
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
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
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