Expert: Jayendra Upadhye - 4/2/2008

Question
Should we be concerned, in your opinion about the upcoming experiment in
Switzerland? what are the chances that we can actually create a stable
expanding black hole that swallows the earth?

Also, could the rotating (clockwise for example) motion of spiral galaxies be
seen as a possible equal and opposite reaction of black holes spinning
(counterclockwise as it were)?

Answer
Hi,
Refer:-http://en.wikipedia.org/wiki/Black_hole

CERN (the LARGE HADRON COLLIDER project) conducted two specific studies on the subject, the last was conducted in 2007, and results were out in 2008.

It all depends on one fact. If hawking radiation is TRUE, these black holes will evaporate in under ten biliion billionth of a second!
If NOT, you better start saying your prayers right NOW!
For such a blck hole would be gravitationally bound to the earth, and by inference to the solar system! It would have enough time to do all the gobbling it could, and that too at leisure.
Mind you, even then, it would have not more than one earth mass at its disposal, and would consequently continue to orbit the sun , with moon in tow, as though nothing extra-ordinary had happened.
Yes the moon would be left completely unaffected, as it all depends on MASS!
Having gobbled the earth, and having started with almost zero initial mass, the moon would still see "an object" of earth mass at the center of its orbit. Only the SIZE of that object would be ZERO!

By that token if the sun were to become a black hole suddenly tomorrow, the earth would barely feel the effect as the sun's gravitating mass would be largely still the same. (Except all would be dark ofcourse).

You see, what you are worried about, (the LARGE HADRON COLLIDER experiment), happens daily at the edge of the atmosphere in a far far more energetic way, when cosmic rays collide with the atoms of the arth's atmosphere! Only, the holes (if any) that are created, travel out of the solar system at relativistic speeds and dont "bind themselves gravitationally" to the earth or moon or the sun!
Some in fact, like solar neutrinoes, should tunnel right thru with zero inteeration due to extremely small cross sections they present to any intervening matter.

read all about that in the link.

regards
Jayen