Re: CERN Atom Smasher May End the World
- From: Eivind Kjorstad <eivindorama@xxxxxxxxx>
- Date: Tue, 15 Apr 2008 10:56:18 +0200
Tim Little skreiv:
Of course, that also means that even a slow micro black hole should
not be dangerous even if it doesn't decay. The timescale for ramping
up to macroscopic size should be as near to eternity as makes no
difference.
True. But I was wondering about the growth-curve.
Seems to me a hypothethical non-evaporating tiny black hole could orbit inside the sun for a long time without picking up anything.
For the perspective of the black-hole, even the interor of the sun is a near-vacuum. The distance between particles that can be swallowed is MUCH larger than the diameter of the black hole.
One it starts growing though, this changes gradually. And as the hole gets larger, so does its apetite and its gravity, though feeble at first.
But just how dramatic would the process be ?
How long would it take for a hole of this type orbiting inside the sun to grow from the size where it swallows 1g/day and until it eats the entire sun ?
How long from we-detect-hole-inside-sun and to sun-disappears ? Years ? Months ? Weeks ? Days ? Hours ?
Eivind Kjørstad
.
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