Black Holes

New analysis of gravitational wave data indicates that the universe's heaviest black holes arise from multiple collisions inside dense star clusters instead of single stellar collapses.

13. april 2026 Rapporteret af AI

Astronomers have observed a supermassive black hole in galaxy J1007+3540 restarting powerful jets after nearly 100 million years of inactivity. The jets, distorted by intense pressure from a surrounding galaxy cluster, stretch nearly a million light-years. The findings reveal cycles of black hole activity shaping the galaxy's structure.

Astronomers suggest that the Milky Way's core might host a dense clump of fermionic dark matter rather than a supermassive black hole. This structure could explain the rapid orbits of nearby stars and the smoother rotation of distant material. The findings, published in Monthly Notices of the Royal Astronomical Society, challenge long-held views of Sagittarius A*.

28. januar 2026 Rapporteret af AI

A new study proposes that hypothetical dark stars, powered by dark matter, could account for three surprising observations from the James Webb Space Telescope in the early universe. These include ultra-bright blue monster galaxies, overmassive black holes, and mysterious little red dots. Researchers suggest these exotic stars formed quickly after the Big Bang and seeded supermassive black holes.