Black hole

A black hole can be formed by the death of a massive star. At the end of a massive star's life, the core becomes unstable and collapses in upon itself, and the star’s outer layers are blown away. The crushing weight of constituent matter falling in from all sides compresses the dying star to a point of zero volume and infinite density called the singularity. black holes Only the most massive stars—those of more than three solar masses—become black holes at the end of their lives. Stars with a smaller amount of mass evolve into less compressed bodies, either Black holes usually cannot be observed directly on account of both their small size and the fact that they

An international team of astronomers led by scientists at the Center for Astrophysics | Harvard & Smithsonian who produced the . The new picture was captured by researchers from the Event Horizon Telescope (EHT) Collaboration who unveiled their first image in 2019. The group targeted both black holes at the outset but focused their attention on one at a time, owing to a difference in the complexity of the two projects. “This is our supermassive black hole,” said Peter Galison, director of Harvard’s Black Hole Initiative, a member of the EHT team, and the Joseph Pellegrino University Professor in the History of Science and Physics. “This is at the center of where we live.” The image of this object known as Sagittarius A-star, often referred to as Sgr A* (pronounced sadge-ay-star), shows the telltale sign of a black hole, as did the earlier one in the Messier 87 galaxy (M87): a bright ring of superhot glowing material circling a dark center so dense and bottomless that not even light can escape. The way the light bends around the dark center, known as the event horizon, shows the object’s powerful gravity, which is four million times that of our sun. The new picture, described today in a “Having seen this bright ring around the darkness of a black hole once was astonishing, but having now seen it twice, we begin to really have confidence of what we’re seeing and that at the center of galaxies there are these enormous black holes that are millions or even billions of times th...