MEMES
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Black hole’s insides:
It’s now thought that every galaxy has a black hole at its centre. There are almost countless billions of them. And they are just the big, obvious ones. It looks like the universe is positively teeming with them.
The gravity at the surface of the black hole is so enormous that it warps space and time to the degree that light, and everything else, can’t escape. The so-called ‘event horizon’ is the point where the gravity becomes strong enough to do this. Any sufficiently massive object, e.g. a giant star, can become a black hole, in fact, if it’s massive enough, it has to become one.
Impossible though it would be, imagine travelling down though the surface of a black hole and burrowing towards its centre. As you travel ‘downwards’, the enormous gravitational ‘pull’ you perceive will become less and less ; because it will be counteracted by the gravity caused by the mass you’ve left behind you on your travel.
If you could reach the exact centre of the hole, the averaged gravitational field there would be zero, just as it would be at the centre of any star, or planet, like Earth. That implies that there must be a second ‘event horizon’ inside the hole, somewhere between its surface and its centre. In other words, a spherical zone inside the black hole which is more or less normal, though highly unpleasant, space.
We propose a change in the term ‘black hole’ to ‘black shell’.
Note * Recent calculations by Stephen Hawking, suggest that matter, information, whatever - stuff - can gradually escape - if so, the fate of black holes is to eventually disintegrate.
