primordial black holes are comparatively tiny. But while they are small, primordial black holes are still extremely dense and have enormously powerful gravitational fields. Those tidal forces ...

A high-energy neutrino detected by an underwater observatory in February 2025 may provide the first real evidence supporting ...

The field of science continues—full steam ahead—to marry technological advancement and eco-friendly solutions with a micro ...

DESI, which will be scanning the sky for five more years, is expected to observe around 40 million galaxies and quasars ...

Tiny in this context means something around a billionth of a billionth of the mass of the sun—a couple billion tons, or the mass of a small asteroid. A black hole of this mass would be about the ...

At the time, the mysterious object, which was widely referred to as a "black hole," sparked wild rumors online. However, it was quickly revealed to be an uninhabited island covered with dense trees.

At the center of our galaxy, hidden behind dense clouds of gas and dust, the black hole Sagittarius A* rotates rapidly, ...

More information: Robert J. Scherrer, Gravitational Effects of a Small Primordial Black Hole Passing Through the Human Body, arXiv (2025). DOI: 10.48550/arxiv.2502.09734 ...

The Large Magellanic Cloud, a close neighbor to the Milky Way, may house a giant black hole. It's the closest supermassive ...

Black holes formed by the collapse of individual stars are relatively small but incredibly dense. One of these objects packs more than three times the mass of the sun into the diameter of a city.

"We would like to understand the difference between these systems, which holds the clue to understand just how many cosmic rays are produced in the jets of microquasars." Using 16 years of data ...

Black holes can eat other black holes, so it’s possible that the supermassive ones are made of many small black holes merged together. “Or perhaps these big black holes were especially hungry, and ate ...