Apparently, this would be the first time such a pair could be found in an ordinary galaxy. According to sources, the unique objects were discovered because they ripped apart a star when the ESA's observatory just happened to be looking in the right direction.

Finding black holes in inactive galaxies is a difficult task. It needs luck to detect them. For this, the astronomers have to wait for a tidal disruption event.

According to sources, such an event occurred in this case as a star was pulled apart by the gravity of the black hole, resulting in a burst of X-rays. It was a case of the ESA's XMM-Newton space observatory looking at the right place at the right time.

The event was spotted by XMM-Newton in galaxy SDSS J120136.02+300305.5, approximately 2 billion light-years away.

The discovery is considered to be an usual one. What makes it even more unusual is that the two black holes were found together, orbiting each other, the product of two galaxies having merged.

(JPN)

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