On 17 Apr 2014 at 10:22, Jeffrey Schwartz wrote:

> On Thu, Apr 17, 2014 at 9:41 AM, Tim <xxxxxx@little-possums.net> wrote:
>
> >> The creation of a black hole is, I presume, an explosive process.
> >
> > In many cases *very* explosive: a Type II supernova.  These usually
> > result in a substantial loss of mass as well as extremely intense
> > radiation, so any surviving planets probably escape the weaker gravity
> > of the black hole (compared with the original star).  Some of the
> > matter from the explosion may condense into planets.  Most will be
> > ejected from the system at very high speed, but a small fraction won't
> > *quite* have enough energy to escape.  Although it won't have much
> > angular momentum, there are processes by which stable (though usually
> > highly elliptical) orbits can result.  So such a supernova remnant can
> > have planets.  Even old planets, if it exploded long ago.
> >
> >
>
> I've got this mental image, wondered if you could comment on the 'realism' --
>
> Imagine  a black hole with a "hot" disk, and a planet with no-rotation
> (tidal lock, like the moon) in a very, very, very, very long ecliptic
> orbit, on the order of 250 years or so.
> The "sun-side" of the planet takes a continued splatter of X-rays,
> which hit sundry elements inside the core and heat it, which then
> cause hot springs on the other side of the planet. Also, portions of
> the atmo fluoresce under the beating, providing pseudo-sunlight, even
> though you're on the dark side.
>
> The planet was the home of a TL6 race at one point, which realized
> what was about to happen, and created deep, deep shelters since they
> had no space flight capability. This did them no real good, but it did
> allow a lot of bacteria, spores, fungus, and some insects to survive.

Unlikely.

Thde *neutrino* flux from a supernova will be prompt lethal to humans
at *Jupiter's* distance. That's 5.2 AU. The flux at 1 AU will be 27
times higher.

While there are radiation resitant bacteria, they aren't that common.
So damn few things will survive the neutrino pulse. Most of those
will die when several miles of the crust get melted/vaporized.

You might still have some deep rock bacteria,but the odds of them
being able to colonize the surface are low.

--
Leonard Erickson (aka shadow)
shadow at shadowgard dot com