Just to be pedantic (and i know, ironically, i cant spell it), when andromeda and the milky way do collide, the chance of a planet or star colliding is almost zero because of the vastness of distance between them within our own galaxy. Secondly in 10^101 years, (10 with 101 zeros after it) the universe will just be an emptyness with only photons zooming around, so old that even the black holes themselves will have evaporated (things do escape from a black hole, just at such a miniscule rate, that its sucking on a "vacuum" is good enough to hold it, a few atoms) but anyway, how wud u survive that? :P