Quote:
Originally Posted by freeztar
The universe is not 2D. It is 3D. Though, with the contributions of Relativity Theory, modern physicists consider the universe to be 3 dimensions of space and 1 dimension of time, making the universe 4D. Others have suggested that the universe has other dimensions that are hidden from our senses. M-Theory seeks to answer such questions.
Most likely, Eventually, yes.
It depends on what you mean by above and below. Above the north pole is Polaris and above the south pole is Octantis. This changes due to the Earth's precession. To read more about this, look at the wiki for pole stars. |
one more thing--
if universe is 3d<in travelling sense>then how will we locate say a star or planet from earth.for example alpha centauri is 4.37 light years away but which direction or angle from us???it is never mentioned
