Astronomy & amp; Astrophysics: a pair of supermassive black holes discovered in the galaxy NGC 7727 
Astronomers using the VLT (Very Large Telescope) of the European Southern Observatory a pair of supermassive black holes that are closer together than any other pair of black holes ever observed. This is reported in an article published in the journal Astronomy & Astrophysics.
The largest black hole, located right in the nucleus of the galaxy NGC 7727, has a mass almost 154 million times the mass of the Sun, while while the mass of its satellite is 6.3 million solar masses. This was measured thanks to the influence of both objects on nearby stars.
Scientists suspected that there were two black holes in the galaxy, but they could not confirm their presence, since they did not detect a large amount of high-energy radiation. The search for similar hidden pairs of supermassive black holes is expected to advance thanks to the Extremely Large Telescope (ELT), which will begin operation later this decade in the Chilean Atacama Desert.