A massive black hole at the heart of a galaxy in the Virgo constellation is waking up, shooting out intense Xray flares at regular intervals that have puzzled scientists, a study said Friday.
Astronomers previously had little reason to pay any attention to galaxy SDSS1335+0728, which is 300 million light years from Earth.
But in 2019, the galaxy suddenly started shining with a brightness that turned some telescopes its way.
Then in February last year, Chilean astronomers started noticing regular bursts of X-rays coming from the galaxy.
This was a sign that the galaxy’s sleeping black hole was waking from its slumber, ...
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