Tag: black hole
Gravitational waves: the origin of the enigmatic black holes of Ligo and Virgo becomes clearer
Many mergers detected by Ligo and Virgo involve black holes whose masses exceed those of stellar black holes betrayed by X-ray emissions. Scenarios have been proposed to account for the…
Surprise! A giant black hole makes stars
Black holes are often perceived as cosmic ogres, destroyers of stars. And yet, observations carried out thanks to the high resolution of the Hubble Space Telescope show that sometimes they…
40 billion billion stellar black holes in the observable Universe!
We don’t really know how far the Universe extends in space but we know how to estimate the size of the volume of what is called the observable Universe. A…
The number of black holes in the observable Universe would be gigantic!
We don’t really know how far the Universe extends in space but we know how to estimate the size of the volume of what is called the observable Universe. A…
A “monstrous” mini-black hole unearthed in a dwarf galaxy
A team of astronomers have discovered a supermassive black hole of a few hundred thousand solar masses in a dwarf galaxy, Mrk 462. The discovery of this “small” black hole…
Here is the most powerful supernova in X-rays ever observed
In 2018, astronomers observed the first supernova explosion of a new class called “the Cow”. Today, a team reports discovering news of these amazing explosions. The brightest ever observed in…
Giant mini black hole discovered in dwarf galaxy
A team of astronomers have discovered a supermassive black hole of a few hundred thousand solar masses in a dwarf galaxy, Mrk 462. The discovery of this “small” black hole…
Most powerful X-ray supernova ever seen
In 2018, astronomers observed the first supernova explosion of a new class dubbed “The Cow”. Today, a team reports having discovered news of these astonishing explosions. The brightest ever seen…
Biography | Stephen Hawking – Theoretical Physicist and Cosmologist
Stephen William Hawking, born January 8, 1942 in Oxford, is a physicist British theorist and cosmologist well known for his work on black holes, the cosmology quantum and its popular…
Centaurus A black hole eruption occupies 16 times the size of the Moon in the sky
Radio astronomers have produced the most complete picture of radio broadcasts from one of the Milky Way’s closest supermassive black holes. The show is fed by the central black hole…