Questions

[sharad]

1. When is gravity repulsive? Can matter exhibit this kind of gravity?
2.Theoretically if you reach the end of the universe what would be
there?
3.If the universe is expanding everywhere, does this mean the solar
system's configuration is continuously changing?
4.When the whole universe is supposed to be expanding, does this mean
all of us and the objects around us are increasing in size at an equal
rate?
5.Recently there was a 'picture of the universe' in the paper. What is
it?
6.Are there any truly random events,i.e.,one that cannot be predicted
using equations? Does this mean they violate the cause-effect
principle?

[Amogh Jalihal]

yes even i saw the "picture" of the universe.what i dont understand is
that if the universe is expanding , shouldnt it expand into something?
but that would mean that there is something out there beyond the
universe which is contradictory....anyway,can mathematical equations
predict or model such an expansion into ...would that be vacuum?or
something even more un-understandable than that ?!