Comments about "Schwarzschild radius" in Wikipedia
This document contains comments about the document "Schwarzschild radius" in Wikipedia
 The text in italics is copied from that url
 Immediate followed by some comments
In the last paragraph I explain my own opinion.
Contents
Introduction
The article starts with the following sentence.














1. History










2 Parameters












3. Formula












4. Black hole classification by Schwarzschild radius
4.1 Supermassive black hole








4.2 Stellar black hole








4.3 Primordial black hole








5. Other uses
5.1 In gravitational time dilation








5.2 In Newtonian gravitational fields








5.3 In Keplerian orbits








6. See also
Following is a list with "Comments in Wikipedia" about related subjects
Reflection part 1
The Schwarzschild radius does not describe a physical concept, in a sense that physical processes depent about the Schwarzschild radius. The only thing that we know is that objects which are smaller than the Schwarzschild radius are becomming invisible for human beings, but this specific radius says almost nothing about the internal processes that take place inside the object (BH). In fact the actual radius of the BH can be much smaller as the Schwarzschild radius.
See for more infomation "Reflection part 2"
See also Event horizon  Reflection 1
Reflection part 2
The following table contains the Schwarzschild radius of certain astronomical objects.
The table is divided into two parts.
 The first part contains the name of the object, the mass in sun masses m0, the radius, the volume and the density.
 The second part contains the density of the sun, the radius and the volume.
The first part is calculated assuming the the radius of the BH is the Schwarzschild radius.
The second part is calculated assuming that the density of the BH is the same as the density (rho0) of the Sun.
Name  m0  rs 1  vol 1 
dens 1  dens 2  vol 2  rs 2 
Sun  1  2945  1.07 E+11  1.86 E+19  1.86 E+19 
1.07 E+11  2945 
Earth  3.003 E6  8.844 E03  2.898 E6  2.062 E+30  1.86 E+19 
3,214 E+5  42,491 
BH 1  100  2,945 E+05  1.07 E+17  1.86 E+15  1.86 E+19 
1.07 E+13  13670 
Milky Way  3.6 E+10  1.06 E+10  4.993 E+30  1.435 E+6  1.86 E+19 
3.852 E+17  4.514 E+5 
BH 2  1.36 E+8  4.005 E+11  2.692 E+35  1005  1.86 E+19 
1.455 E+19  1.515 E+6 
Andromeda  1.9 E+8  5.596 E+11  7.340 E+35  515,1  1.86 E+19 
2.033 E+19  1.693 E+6 
NGC 4889  2.1 E+10  6.185 E+11  9.910 E+41  0.04217  1.86 E+19 
2.247 E+21  6.126 E+6 
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Created: 6 October 2016
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