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The earliest black holes in the universe may still be with us, surprising study claims
The earliest black holes in the universe may not have disappeared from Hawking radiation after all, new research hints. Instead, they fed on the energy of the ancient cosmos to grow supermassive.
Strange rocky world found lurking on the edge of 'inside out' planetary system
Astronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.
Radio signal discovered at the center of our galaxy could put Einstein's relativity to the test
Scientists hope to probe the nature of general relativity through a possible pulsar found in the center of the Milky Way, near a supermassive black hole.
Our leading theory of dark matter may be wrong, huge new gravity study hints
New research using a space-time phenomenon predicted by Einstein presents evidence that the invisible backbone of the universe may be much "fuzzier" than we realized.
Something supercharged Uranus with radiation during Voyager flyby 40 years ago. Scientists now know what.
Forty years ago, Voyager 2 flew past Uranus and observed radiation levels that defied explanation. Now, scientists may finally know exactly what happened.
New 'sungrazing' comet could become visible to the naked eye during the day — if the sun doesn't destroy it
The newly discovered sungrazing comet C/2026 A1 (MAPS) will undergo an extremely close slingshot around our star in early April, and could become bright enough to be seen without a telescope during the day.
Impossibly powerful 'ghost particle' that hit Earth may have come from an exploding black hole
A supercharged neutrino that smashed into our planet in 2023 may have been spit out by an exploding primordial black hole with a "dark charge." If true, this theory could lead to a definitive catalog of all subatomic particles and unveil the elusive identity of dark matter.
Dramatic death of Comet C/2025 K1 (ATLAS) caught on camera — Space photo of the week
The Gemini North telescope snapped a spectacular view of Comet C/2025 K1 (ATLAS) breaking apart as it emerged from the other side of the sun in October.
