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Tonight
Mercury is farthest from the sunset on October 12
The innermost planet, Mercury, will be 25 degrees from the sun at greatest elongation at 10 UTC on October 12. Look for it shortly after sunset.
October 9, 2026
Earth
Why leaves change color in the autumn
Did you know the vivid colors of autumn leaves are there throughout spring and summer, but hidden? Here's why leaves change color in the fall.
October 9, 2026
Sun
Sun news: Bam! AR4549 fires an M6.7 flare and a blob
Sun news, October 9, 2026: Bam! AR4549 fired an M6.7 flare and a partial halo CME. Meanwhile, the October 6 CME arrives today with G1-G2 storms possible.
October 9, 2026
Space
Black holes could have planets, new simulations suggest
New simulations by 2 astrophysicists suggest that supermassive black holes could have planets orbiting them, much like planets orbit stars.
October 8, 2026
Earth
Hurricane Isaias is the 1st hurricane of the Atlantic season
Hurricane Isaias has become the 1st hurricane of the 2026 Atlantic season. It should bring dangerous storm surge to the Gulf Coast Friday and Saturday.
October 8, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. Don't miss tonight's Draconid meteor shower! The Orionids are coming soon, too. Watch a video and see charts here.
October 8, 2026
Space
Hera mission hits the brakes to arrive at asteroid
The Hera mission will hit the brakes Thursday as it slows down to reach Dimorphos. This asteroid is the site of a human-made impact in 2022.
October 8, 2026
Astronomy Essentials
The ghost of Biela’s Comet: It created a storm and disappeared
November's Andromedid meteor shower is from the ghost of Biela’s Comet. It stunned observers in the 1800s, breaking up and producing meteor storms.
October 8, 2026
Today's Image
Martian dawn pic from Curiosity rover highlights cliffs and crags
On October 6, 2026, NASA released an image of Martian dawn from the Curiosity rover. The image captures a pale light illuminating distant cliffs and crags.
October 8, 2026
Today's Image
Moon and Jupiter pics here! A cosmic hide-and-seek
On Tuesday morning, the moon slid in front of Jupiter, blocking it from view. Our EarthSky community shared their moon and Jupiter pics.
October 7, 2026
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