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Space
Weird, ultra-hot, double-tailed planet surprises scientists
WASP-121 b is a scorching double-tailed planet. Helium gas is escaping from its atmosphere and forming 2 huge tails along its orbit.
December 17, 2025
Space
Researchers question methane atmosphere on TRAPPIST-1e
Previous hints of a methane atmosphere on TRAPPIST-1e might not be accurate, a new paper suggests. But the tantalizing exoplanet could still have an atmosphere.
December 17, 2025
Sun
Sun news: Huge eruption on sun’s far side!
Sun news December 17: A powerful far-side explosion sent a towering prominence over the sun’s northeast limb this morning.
December 17, 2025
Constellations
Look for Cetus the Whale swimming in a celestial sea
Cetus the Whale is a huge constellation that swims in a sea of stars near constellations named for a river and fish. And it contains a wonderful variable star.
December 17, 2025
Human World
The Wright brothers succeeded 122 years ago
The Wright brothers made aviation history on December 17, 1903, taking humanity’s 1st powered flight into the skies at Kitty Hawk.
December 17, 2025
Space
Astronomers create 1st map of the sun’s outer boundary
Astronomers have produced the 1st map of the sun's outer boundary, the point-of-no-return for material that escapes the sun's magnetic grasp.
December 16, 2025
Space
Astronomers see monster stars from the cosmic dawn
Researchers have found evidence for monster stars in the early universe. These giants collapsed directly into the earliest supermassive black holes.
December 16, 2025
Clusters Nebulae Galaxies
The Andromeda galaxy: All you need to know
The Andromeda galaxy is the closest large galaxy to our Milky Way. At 2.5 million light-years, it's the most distant thing you can see with the eye alone.
December 16, 2025
Constellations
Fornax the Furnace: A dim constellation with galaxies galore
Fornax the Furnace appears as a few dim stars to the unaided eye but harbors galaxies from one orbiting the Milky Way to some at the edge of the universe.
December 16, 2025
Space
Interstellar object Comet 3I/ATLAS passes Earth on Friday
Interstellar object Comet 3I/ATLAS will make it closest pass by Earth on December 19, 2025. Also, what do scientists mean by non-gravitational acceleration?
December 16, 2025
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