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Space
Humanity’s 1st intentional signal to space 52 years ago
The iconic Arecibo telescope is no longer operational. But its legacy lives on. And in 1974, Arecibo sent earthlings' 1st intentional signal to space.
November 15, 2026
Space
The strange case of the disappearing exoplanet — solved!
Meet TOI-2535 b, the "disappearing exoplanet." This hot Jupiter didn't really disappear, but its tilted orbit determines when we can see it.
November 15, 2026
Sun
Sun news: These 2 astronomers changed how we see the sun
Sun news November 15, 2026: Today we honor Kepler, who mapped how planets orbit the sun, and Herschel, who found invisible light in sunlight!
November 15, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for November
Visible planets and night sky guide: Tomorrow morning, look east for Jupiter and Mars. They'll be just over a degree apart!
November 15, 2026
Earth
Earth’s spin is constant. Why don’t we feel it?
We don't feel Earth's spin on its axis because our world spins in a way that is steady and constant. It carries us as passengers along with it.
November 15, 2026
Space
Mountain-sized asteroid 1999 AN10 to pass close to Earth in 2027
Asteroid 1999 AN10, which might be a mile wide, will pass Earth on August 7, 2027, about 1 lunar distance away. The encounter poses no danger.
November 13, 2026
Astronomy Essentials
Brightest Stars
Mirach is your guide star to finding 3 galaxies
Mirach in the constellation Andromeda helps stargazers locate the Andromeda Galaxy, the Triangulum Galaxy, and "Mirach's Ghost."
November 13, 2026
Space
‘Rosetta Stone for Mars:’ Martian meteorite hints at ancient life
A rare 4.1-billion-year-old Martian meteorite, Teghaza 001, provides new clues about Mars' ancient and more habitable past.
November 12, 2026
Astronomy Essentials
Is there a North Star for Mars?
Is there a North Star for Mars ... a guide star for future explorers? Not in any satisfying way. But Martian stargazers wouldn't lack for things to see!
November 12, 2026
Space
This active asteroid has grown a tail! What happened?
Active asteroid 1995 BJ4 has grown a cometlike tail, leaving astronomers wondering what’s happening.
November 11, 2026
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