: : I don't think that a black whole so far away would afect us. A black hole is not like a vacuum you know. A black hole only effects objects that are beyond the event horizen : : so even if our sun were to become a black hole, the earth would not be affected.

: Actually, at the event horizon, the escape velocity : is equal to the speed of light. The black hole would : still exert some force on a body out of this distance, : but you are right in saying that it is not a cosmic : vacuum cleaner. For a 3 solar mass black hole, the : horizon would be about 3000km, so it would rip up : things inside this. But with very large black holes : like several billion solar masses, objects could : survive even when crossing the event horizon, located : at the Schwartzchild Radius.

you need help mate...read general relativity... please stop talking rubish untill you know what your talking about!!