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. A sudden spike in the galaxy’s brightness had been automatically detected by the Zwicky Transient Facility’s telescope at the Palomar Observatory in California.
The researchers compared the data with follow-up observations taken by the European Southern Observatory’s Very Large Telescope, or VLT, in Chile, the Southern Astrophysical Research Telescope in Chile, the W. M. Keck Observatory in Hawaii and NASA’s space-based Neil Gehrels Swift and Chandra X-ray observatories.
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