CNN —Astronomers are witnessing a never-before-seen spectacle in the cosmos: the awakening of a supermassive black hole at the center of a distant galaxy. In late 2019, a team of astronomers took notice of an otherwise unremarkable galaxy named SDSS1335+0728, 300 million light-years away in the Virgo constellation. “If so, this would be the first time that we see the activation of a massive black hole in real time.”Sleeping celestial giantsSupermassive black holes are classified as having masses more than 100,000 times that of our sun. “In the case of SDSS1335+0728, we were able to observe the awakening of the massive black hole, (which) suddenly started to feast on gas available in its surroundings, becoming very bright.”Previous research has pointed to inactive galaxies that appeared to become active after several years, which is usually triggered by black hole activity, but the process of a black hole awakening has never been directly observed before, until now, Hernández García said. The same scenario may play out with Sagittarius A*, the supermassive black hole at the center of the Milky Way, but astronomers aren’t sure how likely it is to occur, Ricci said.

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Persons: ”, Paula Sánchez Sáez, Neil Gehrels Swift, Chandra, Sánchez Sáez, Lorena Hernández García, Claudio Ricci, “, Hernández García, Ricci Organizations: CNN —, Palomar, Astrophysics, European Southern Observatory, Survey, Micron, Sky Survey, Sloan, European Southern, Southern Astrophysical Research, Keck, Millennium Institute of Astrophysics, University of Valparaíso, Diego Portales University Locations: California, Germany, European, Chile, Hawaii, —