Black Hole is the area or region of the space where even the light cannot pass from it. Albert Einstein first predicted black hole in 1996 in his general theory of relatively. American astronomer John Wheeler in 1967 coined the term “black hole”, and the first one was discovered in 1971.
Until today, the scientist has discovered many black holes in our universe at different places in space. It can be as small as Planck length, 1.6*10-35m to largest having thousands of solar mass. The largest black holes are also known as supermassive black holes. These black holes measurement system includes the solar masses which is equivalent to the weight of the sun.
Sagittarius A* (Pronounced as Sagittarius A asterisk) at the center of Milky Way is a bright and very compact astronomical radio source, near the border of the constellation, Sagittarius and scorpions. It is 26,000 light years from earth.
Among the most massive Black Holes, here are 5 massive black holes discovered so far which are considered by the scientists.
It is the largest black hole ever discovered having 40 billion solar masses. It is so massive, that it is over 300 trillion times more luminous than the sun. However, the mass may be overestimated and a more accurate measurement is yet to take. It is the hyperluminous quasar. The mass was measured by Swift Spacecraft.
Size: 40 billion solar masses
Distance: 1.2* 1010 Light Years from Earth
- SDSS J102325.31+514251.0
The Sloan Digital Sky survey detected this massive black hole. They also detected over 200,000 quasars with the majority of them not yet weighed. There may be more weighing in as much as their SDSS J102325.31+514251.0.
Size: 33.1 billion Solar Masses
It is the most massive black hole with an accurately defined mass. accurately measure around 14.5 times the diameter of Pluto’s orbit i.e., (1,150 Astronomical unit) located at 3.4 billion light years away is thought to have dimmed from our perspective. But new explanation according to scientist includes was clouds of hydrogen and oxygen cloud, which may permeate the entire visible universe. It was discovered in 2014.
Size: 30 billion solar masses
Distance: 3.4 * 1010 Light Years from Earth
- APM 08279+5255 (Active Quasar)
From 12 billion light years away it brightly emits all wavelengths and has been studied extensively. It is surrounded by the huge reservoir of water, equivalent to 140 trillion times all the water on earth. It possess large region of hot dust and molecular gas, as well as regions with starburst activity. Identified initially as quasar in 1998 during Automatic Plate measuring facility (APM) survey to find carbon stars in galactic halo.
Size: 23 billion solar masses.
Distance: 12 Billion Light Years from Earth.
- NGC 4889(also known as Coma B)
It is so massive, that its event horizon reaches out 124 billion kilometers from it center which makes its event horizon twelve times larger than orbit of Pluto. It was discovered by
1785 by the British Astronomer Frederick William Herschel I who catalogued it as bright, nebulous patch.
Constellation: Coma Berenices
Size: 21 billion solar masses i.e., 5,200 times size of Sagittarius of A*.
Distance: 308 million Light Years from the Earth.
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