Re: A partial black hole?

Tim Little <tim@[EMAIL PROTECTED]
> wrote:

> On 2008-03-07, Jonathan L Cunningham <spam@[EMAIL PROTECTED]
> wrote:
> > Presumably you are saying that, at that distance, the gravitational
> > force is infinite (= arbitrarily high acceleration).
> 
> In the sense of "force required to keep you at constant distance", yes
> it is.
(snip)

> > So what's the formula for the gravity at a distance D from a black
> > hole?
> 
> If I haven't totally messed up the derivation, it should be
> pro****tional to (sqrt(D/(D - R)) / D^2) for a Schwarzschild black hole
> with event horizon at R.  (I would not be surprised if I have)

Thanks.

Now I have to revise some mental images ... :-)

For one, it's *much* more dangerous for a space****p even to pass *near*
a black hole than I'd realised.

Jonathan