Subject:
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Re: Black Holes
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Mon, 11 Aug 2003 19:10:34 GMT
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Viewed:
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384 times
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"Stefan Garcia" <sastrei@netscape.net> wrote in message
news:HJGJrG.1BC9@lugnet.com...
> A Black Hole is supposed to be a collapsed neutron (type?) star, right? • So
> then, why is a Black Hole always depicted as an infinite toilet-flush? I • can
> understand that the "matter disc" forms into a disc because of gravity, • like the
> rings of a planet, but shouldn't the actual
> whatever-is-at-the-heart-of-a-black-hole be an infinitely small pinpoint?
>
> I'd attribute this to popular myth, except that even NASA seems to show • the
> "infinite toilet-flush" as the shape of a black hole.
>
> -Stefan--"maybe too much time on his hands"-G.
Your infinitely small pinpoint sounds about right. The "border" of a black
hole is defined as the even horizon, the point where not even light can
escape the hole. So there's really no physical boundry.
The trick with black holes is that they are just that--black holes. You
can't draw a picture of something that emits/reflects no light, so you can
do the next best thing: draw a picture of the stuff falling into the black
hole.
The infinite toilet flush you're talking about probably refers to the
bending of space-time and it's more of a mathematical model than a picture.
It's a way of showing that at the area near a black hole, space curves so
much that it folds in on itself.
The "matter spouts" mentioned later in this thread I believe have been
proven, sort of. Stephen Hawking has shown that black holes can "evaporate"
away. I don't remember the reasons, but it's some quantum mechanics trick.
From a google search:
http://xxx.lanl.gov/abs/gr-qc/0010055
-- Tom
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Message has 1 Reply:
 | | Re: Black Holes
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| (...) The "matter" a black hole gives off is Xrays. The constant streamout of Xrays is what will, in about 10e60 years (what? no exponent in FTX?) cause black holes to start exploding. At this time, exploding black holes will be the only source of (...) (21 years ago, 12-Aug-03, to lugnet.off-topic.geek, FTX)
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Message is in Reply To:
| | Black Holes
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| A Black Hole is supposed to be a collapsed neutron (type?) star, right? So then, why is a Black Hole always depicted as an infinite toilet-flush? I can understand that the "matter disc" forms into a disc because of gravity, like the rings of a (...) (21 years ago, 11-Aug-03, to lugnet.off-topic.geek, lugnet.space)
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