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Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity.

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Thomas 'PointedEars' Lahn <PointedEars@web.de> writes:

>Martin Brown wrote:

>> (although the page on Sgr A itself says 4.1M sun and about 45AU)

>You are confusing the radius of the region surrounding the assumed black 
>hole with the Schwarzschild radius of the black hole, whereas the former is 
>much larger.  Note that for such a BH, the Schwarzschild radius is the 
>radius beyond which we can have *no* information instead (as it *is* the 
>radius of the *event horizon*).

The "45AU" size is the maximum radius of whatever "it" is, if it was any
larger, Star S14 would collide with it. So "it" must be smaller than 45
AU radius.

Since we know of no physics that allows for an object of 45 AU radius and a
mass of 4.1M sun, other than a black hole or something rapidly collapsing
into a black hole, this is excellent evidence of a black hole there.

>> Star S14 must be getting awfully close to grazing the event horizon.

>That is possible, but not based on your argument, but based on the diagram.

>For a Schwarzschild BH, the outer event horizon is the surface of a sphere 
>that has the Schwarzschild radius as its radius.  45 AU, the radius of the 
>space in which S14 is described to be orbiting, is not anywhere near 
>0.08 AU.

About 560 times the event horizon radius.  However it is close enough to
likely have interesting relativistic effects.  Another star (S0-102) gets
within 260 AU and reaches over 1% of the speed of light. S14 must be
really booking.

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Re: Black Holes violate the Heisenberg Uncertainty Principle. Tom Roberts <tjroberts137@sbcglobal.net> - 2017-08-18 20:26 -0500
  Re: Take your own advice, Tom Roberts. JanPB <filmart@gmail.com> - 2017-08-18 19:41 -0700
  Odd Bodkin gets the Nobel prize, along with Bert. NobelPrize.ORG  @. - 2017-08-19 07:45 -0700
    Re: Odd Bodkin gets the Nobel prize, along with Bert. Chris Ahlstrom <OFeem1987@teleworm.us> - 2017-08-19 12:45 -0400
      Re: Odd Bodkin gets the Nobel prize, along with Bert. chrisv <chrisv@nospam.invalid> - 2017-08-21 07:04 -0500
  Re: Black Holes violate the Heisenberg Uncertainty Principle. Tom Roberts <tjroberts137@sbcglobal.net> - 2017-08-21 18:00 -0500
    Re: More data, from more observers, is needed. JanPB <filmart@gmail.com> - 2017-08-22 12:28 -0700
      Re: More data, from more observers, is needed. mlwozniak@wp.pl - 2017-08-22 23:25 -0700
      Re: More data, from more observers, is needed. Séverin Thibault <ruud@bwiu.ei> - 2017-08-23 09:34 +0000
    Re: More data, from more observers, is needed. Tom Roberts <tjroberts137@sbcglobal.net> - 2017-08-23 10:41 -0500
      Re: We can't see Sgr A* PROPER, directly. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-23 21:26 +0000
        Re: We can't see Sgr A* PROPER, directly. Odd Bodkin <bodkinodd@gmail.com> - 2017-08-23 16:46 -0500
          Re: We can't see Sgr A* PROPER, directly. mlwozniak@wp.pl - 2017-08-23 23:24 -0700
        Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-23 23:01 +0000
          Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. mlwozniak@wp.pl - 2017-08-23 23:26 -0700
          Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Martin Brown <'''newspam'''@nezumi.demon.co.uk> - 2017-08-24 10:14 +0100
            Re: A TRUE singularity has infinite precision, not +/- 45 AU. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-24 17:04 +0000
              Re: There is no evidence that TRUE black holes exist, none. The Starmaker <starmaker@ix.netcom.com> - 2017-08-25 12:28 -0700
            Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-25 14:34 +0200
              Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-25 15:37 +0000
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-25 19:22 +0200
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-25 18:48 +0000
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-25 21:27 +0200
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-25 21:54 +0000
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-26 03:01 +0200
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-08-26 03:31 +0000
              Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-08-25 21:52 +0200
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Youko Ganchiku <uckyoku@ghnwohwkwu.gi> - 2017-08-25 21:20 +0000
                Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. Youko Ganchiku <uckyoku@ghnwohwkwu.gi> - 2017-08-25 21:26 +0000
          Re: Sgr* isn't even a "black hole", much less a PRECISELY known singularity. mlwozniak@wp.pl - 2017-08-24 02:31 -0700
  Re: Take your own advice, Tom Roberts. Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2017-09-04 14:34 -0400
    Re: Take your own advice, Tom Roberts. Ethel Ocallaghan <unlgclo@awlwaac.ag> - 2017-09-05 11:40 +0000
    Re: "Black Holes" are forever a notion, never measured. moroney@world.std.spaamtrap.com (Michael Moroney) - 2017-09-05 14:04 +0000

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