Black holes are points in space that are so dense. The gravity is so strong because matter (the mass) has been squeezed into a tiny space. These infinitely dense points in space will spaghettify anything that ventures too close. The size of a hole can be determined from the size and mass of the collapsed star. The created black hole is so dense that no light will be able to resist the gravitational pull. The giant stars are usually twenty times larger than the sun. What is a Black Hole?Ī black hole is a dense, compact object whose gravitational pull is so strong that – within a certain distance of it – nothing can escape, not even light.īlack holes are thought to result from the collapse of very massive stars at the ends of their evolution. Black holes are created when a red super giant star collapses, causing a supernova explosion. The black hole is outlined by emission from hot gas swirling around it under the influence of strong gravity near its event horizon. ![]() (There is a supermassive black hole at the center of our galaxy - the Milky Way.) No one has seen a black hole, but scientists have observed gravitational evidence. This point is surrounded by the event horizon. Black holes are believed to form when stars die and their massive bulk collapses inward, creating intense gravitational fields. A black holes entire mass is concentrated in an almost infinitely small and dense point called a singularity. Using the Event Horizon Telescope, scientists obtained an image of the black hole at the center of the galaxy M87. Application of string theory to study black holes is one of the most significant pieces of evidence in favor of string theory. The short linear feature near the center of the image is a jet produced by the black hole. This image was captured by FORS2 on ESO's Very Large Telescope. ![]() The supermassive black hole imaged by the EHT is located in the center of the elliptical galaxy M87, located about 55 million light years from Earth. A classic definition of a black hole would be: a body with a high gravitational force such that the escape velocity exceeds the speed of light.
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