SUPERMASSIVE BLACK HOLE 1 Oz Silver Coin 2$ Niue 2017

US $119.99
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202026
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SUPERMASSIVE BLACK HOLE 1 Oz Silver Coin 2$ Niue 2017

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This beautiful 1 Oz Silver coin is dedicated to the most mysterious element of the galaxies – the Supermassive Black Hole, the largest type of black hole. The coin has a beautiful design, has a wonderful Relief, has a great colorization, in the Antique Finish quality. 

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Supermassive Black Hole
A supermassive black hole (SMBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses, and is found in the centre of almost all currently known massive galaxies. In the case of the Milky Way, the SMBH corresponds with the location of Sagittarius A. Supermassive black holes have properties that distinguish them from lower-mass classifications. First, the average density of a SMBH (defined as the mass of the black hole divided by the volume within its Schwarzschild radius) can be less than the density of water in the case of some SMBHs. This is because the Schwarzschild radius is directly proportional to mass, while density is inversely proportional to the volume. Since the volume of a spherical object (such as the event horizon of a non-rotating black hole) is directly proportional to the cube of the radius, the minimum density of a black hole is inversely proportional to the square of the mass, and thus higher mass black holes have lower average density.

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Country
Niue
Year of Issue
2017
Denomination
2 Dollars
Metal
Silver
Fineness (% purity)
99.9%
Mintage (pcs)
999
Weight (g)
1 oz
Diameter (mm)
38.61 mm
Quality
Antique Finish
Certificate of Authenticity Yes
Package type  Box
Special Features  Color

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