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The concept that black holes may exist that are smaller than stellar mass was introduced in 1971 by Stephen Hawking. [2] It is possible that such black holes were created in the high-density environment of the early Universe (or Big Bang), or possibly through subsequent phase transitions (referred to as primordial black holes).
It may yet be absorbed completely by M60, its central black hole merging with M60's as well. The galaxy may have once had some 10 billion stars. [8] As of 2013, it is possibly the densest known galaxy with over one hundred stars per cubic light-year. [9] As of 2014, it is the smallest and least massive galaxy known to host a central black hole ...
IGR J17091 is a stellar mass black hole with a mass between 3 and 10 M ☉. It is a binary system in which a star orbits the black hole. [4] Its small size may make it a candidate for the smallest black hole discovered. [5] However, as of 2017 its mass was described as "unknown". [6]
Scientists have discovered what may be the smallest-known black hole in the Milky Way galaxy and the closest to our solar system - an object so curious that they nicknamed it 'the Unicorn.' The ...
Scientists confirm an 8,200-solar-mass black hole in the Omega Centauri cluster using 20 years of Hubble data, shedding light on black hole formation and evolution.
The mass of the black hole in GRO J0422+32 falls in the range 3.66 to 4.97 solar masses. [6] This is the smallest yet found for any stellar black hole, and near the theoretical upper mass limit (~2.7 M ☉) for a neutron star. Further analysis in 2012 calculated a mass of 2.1 M ☉, which raises questions as to what the object actually is. [7]
Given the universe is 13.7 billion years old, that puts the age of this black hole at 13.2 billion years. Even more astounding to scientists, this black hole is a whopper — 10 times bigger than ...
The black hole at the center of the Milky Way; second black hole directly imaged (after Messier 87) Messier 32: 1.5 × 10 6 – 5 × 10 6 [112] A dwarf satellite galaxy of the Andromeda Galaxy. NGC 4395: 3.599 × 10 5 [113] May be the smallest supermassive black hole.