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Earth
And the Fat Bear Week winner is … Backpack!
Congrats to Backpack, the winner of Fat Bear Week 2026! Take a look at the final brackets and see where your favorite fatties fell.
October 1, 2026
Earth
What are the world’s loudest birds? Here are 2 contenders
Researchers at the University of Massachusetts Amherst said the bare-throated bellbird and red-legged seriema are 2 contenders for world's loudest birds.
October 1, 2026
Sun
Sun news: Heart-shaped coronal hole facing Earth?
Sun news October 1, 2026: What does the coronal hole on today's sun look like to you? A heart ... or something more sinister?
October 1, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. Venus is disappearing! Watch a video here. And look for the moon near two bright stars, Capella and Aldebaran.
October 1, 2026
Astronomy Essentials
Stargazing tips! 10 great tips for beginning astronomers
If you're new to observing the night sky, check out our top 10 stargazing tips for beginners. We'll help you explore and expand your love for astronomy.
October 1, 2026
Space
JUICE mission completes flyby of Earth: New pics!
The JUICE mission made a successful flyby of Earth on September 28. See new images of Earth and the moon here. The spacecraft will reach Jupiter in 2031.
September 30, 2026
Space
Water systems on early Mars were complex and hot
NASA's Perseverance rover has found evidence of ancient complex water systems on early Mars, including hot hydrothermal activity.
September 30, 2026
Space
Mars calendar year begins September 30: Happy New Year, Mars!
Mars calendar year 39 begins on September 30, 2026. If you’re looking for a reason to celebrate, here’s to a Happy New Year ... on Mars.
September 30, 2026
Brightest Stars
Alpha Cephei, or Alderamin, is a fast-spinning star
Meet Alpha Cephei, in the constellation Cepheus the King. It’s spinning so fast that it appears like a slightly flattened beach ball.
September 30, 2026
Spaceflight
Starship reaches Earth’s orbit for 1st time
SpaceX's Starship spacecraft finally reached Earth's orbit in its 14th test flight on September 28. Though successful, the flight was not without its flaws.
September 29, 2026
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