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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).
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 ...
OJ 287 core black holes — a BL Lac object with a candidate binary supermassive black hole core system [23] PG 1302-102 – the first binary-cored quasar — a pair of supermassive black holes at the core of this quasar [24] [25] SDSS J120136.02+300305.5 core black holes — a pair of supermassive black holes at the centre of this galaxy [26]
Supermassive black holes, regions of space where the pull of gravity is so intense that even light doesn't have enough energy to escape, are often considered terrors of the known universe ...
SEE ALSO: Most of the universe may be trapped inside of ancient black holes DON'T MISS: Stephen Hawking says escape from a black hole is possible — kind of Show comments
Depending on the model, primordial black holes could have initial masses ranging from 10 −8 kg [17] (the so-called Planck relics) to more than thousands of solar masses. . However, primordial black holes originally having masses lower than 10 11 kg would not have survived to the present due to Hawking radiation, which causes complete evaporation in a time much shorter than the age of the ...
Segue 2 is a dwarf spheroidal galaxy situated in the constellation Aries and discovered in 2009 in the data obtained by Sloan Digital Sky Survey.The galaxy is located at the distance of about 35 kiloparsecs (35,000 parsecs; 110,000 light-years) from the Sun and moves towards the Sun at a speed of 40 kilometres per second (25 mi/s).