Black holes escape the destruction of the galaxy

Like the case of fossil vision that guessed an extinct creature, a black hole could provide information about its galaxy that had been previously destroyed.

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The Hubble Space Telescope recently found a cluster of young stars, emitting blue light, surrounding a rare black hole in the universe.

At medium size, the black hole named HLX-1 could once be at the center of a dwarf galaxy, orbiting a larger galaxy. Experts from the Sydney Institute of Astronomy (Australia) argue that its galaxy has been torn apart by the gravitational pull of its neighboring galaxy.

HLX-1 is unique in the universe, until humans find its kind

The fiery confrontation has deprived most of the dwarf galaxy's stars, but the process also puts pressure on the gas surrounding the central black hole, triggering the formation of new generations of stars.

Those are Hubble's stars. The observed results show that this cluster is less than 200 million years old, meaning that the collision between the big galaxy and the dwarf galaxy occurred at that time.

HLX-1 is also the only medium-sized black hole that Earth experts have discovered so far. This black hole has a mass of about 20,000 suns, and is located about 290 million light-years from Earth.

For comparison, the supermassive black hole in the middle of the Milky Way has a mass of about 4 million suns, according to a study published in the Astrophysical Journal Letters.