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Sun
Sun news: Happy 20th birthday, STEREO!
Sun news October 25, 2026: Happy 20th, STEREO! The twin probes first showed CMEs in 3D. Today, a glancing CME could bring a G1 storm and auroras.
October 25, 2026
Astronomy Essentials
Hunter’s Moon falls on October 25-26, with Saturn nearby
The 2026 October full moon is the Hunter's Moon. It falls around October 25-26. It's near the planet Saturn and in front of the constellation Aries the Ram.
October 25, 2026
Human World
Pentagon UAP files part 7: Silent black triangles
The 7th batch of the Pentagon UAP files was released on October 23, 2026. The documents include reports of more triangle craft and more.
October 25, 2026
Astronomy Essentials
Tonight
Visible planets and night sky guide for October
Visible planets and night sky guide. This evening, the moon hangs near Saturn in the eastern sky. In the morning, look for Jupiter and Mars.
October 24, 2026
Astronomy Essentials
Olbers’ paradox asks ‘Why is the night sky dark?’
Olbers' paradox asks why is space dark if the universe is filled with stars. The answer has to do with traveling light and red-shifting colors.
October 23, 2026
Space
1st photo of Earth from space, 80 years ago
On October 24, 1946 — 80 years ago — a movie camera on board a V-2 rocket captured the 1st-ever photo of Earth from space.
October 23, 2026
Space
Why does anything exist? New theory emerges
Why does anything exist? A new theory suggests a forgotten particle might have shifted the balance between matter and antimatter.
October 22, 2026
Space
Lucy mission to Trojan asteroids: 5 years of discoveries
NASA’s Lucy mission is now less than a year from reaching the Trojan asteroids near Jupiter. And it has already made some exciting discoveries along the way.
October 22, 2026
Constellations
Cassiopeia and Perseus on October evenings
Cassiopeia and Perseus are neighbors in the autumn sky. Use Cassiopeia's distinctive W or M shape to locate the dimmer Perseus on autumn and winter evenings.
October 22, 2026
Space
Surprising colors of white dwarf stars revealed for 1st time
Astronomers in the U.K. have found that the true colors of white dwarf stars can vary greatly. They even found the 1st known green star.
October 21, 2026
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