The galaxy “GN-z11”, where the oldest black hole was discovered. Provided by Cambridge University
The oldest black hole in the history of space observation has been discovered. A “black hole”, meaning “black hole”, refers to a celestial body that has very strong “gravity”, which is the force that attracts other objects and sucks in all objects around it. It is called a “black hole” because the celestial body appears black because it is pulled so tightly that not even light can escape.
The research group of Professor Roberto Maiolino of the Cavendish Institute of the University of Cambridge in the United Kingdom recently published in the international academic journal “Nature” the results of research showing the discovery of a black hole that was formed 400 million years ago after the Big Bang (the great explosion that created the universe), that is, 13 billion years ago. . This black hole, captured by the James Webb Space Telescope (JWST), is not only the oldest black hole discovered by humanity, but also has a huge mass (weight) that cannot be explained by existing theories, greatly contributing to the study of the planet. birth and evolution of the universe. I think it will be useful.
Black holes have strong gravity and are created when massive stars explode. Because black holes grow by sucking in surrounding matter under strong gravity, the black hole’s age can be estimated based on its mass. Like the black hole discovered this time, it takes about 1 billion years to reach 100 times the mass of the sun, and this black hole was created less than 400 million years after the creation of the universe. In other words, it is difficult to explain the birth of this black hole with existing theories.
“Astronomers believe that massive black holes grew to their current size over billions of years, but the size of this newly discovered black hole shows that black holes can be created in other ways,” the research team said . in the first place.” “It could be born and absorb matter at a rate five times faster than astronomers expected,” he explained.
▶Donga Children’s Reporter Kim Jae-seong kimjs6@donga.com
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