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Space
Solar system’s most bizarre moons! Take the tour
The solar system’s most bizarre moons reveal active, complex worlds that continue to surprise scientists. Are any of them harboring life?
October 6, 2026
Sun
Sun news: Bam! Three M-class solar flares today!
Sun news October 6, 2026: Bam! Three M flares! Newcomer AR4549 grew into a monster right at disk center. X-flare possible.
Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. Tomorrow morning, look for the moon near Jupiter, Mars and the Beehive. Some observers can see the moon occult Jupiter.
October 5, 2026
Astronomy Essentials
We fly between the sun and Saturn. At opposition today
Don't miss Saturn at opposition on and around the night of October 4, 2026. That's when our planet Earth passes between the sun and Saturn.
October 4, 2026
Human World
Space
World Space Week is October 4 to 10. Find events here
World Space Week dates back to 1999 and runs every year from October 4 to 10. This year, the theme is The Rocket Revolution. Find events near you here.
October 4, 2026
Space
How a helium leak in an exoplanet atmosphere hints at life
A tentative helium detection may offer the 1st glimpse of this exoplanet atmosphere, but we'll need more evidence to know if LHS 1140b could host life.
October 4, 2026
Earth
What are the world’s loudest birds? Here are 2 contenders
What are the world's loudest birds? Researchers say the bare-throated bellbird and red-legged seriema are 2 major contenders.
October 4, 2026
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 3, 2026
Human World
October birthstone: Colorful opal and tourmaline
Take your pick: the October birthstone is either the striking iridescent opal or the many-colored tourmaline. Learn the lore of these pretty gemstones here.
October 3, 2026
Space
Is this an alien radio signal from a super-Earth exoplanet?
Did China's FAST radio telescope detect an alien radio signal coming from the super-Earth exoplanet K2-155 d? Probably not.
October 2, 2026
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