the shape of the universe

The shape of the universe

This is one of the confusing stuff in astronomy which is tough to believe and understand by common man. Practically it ia not possible to move out of the universe and figure out its shape. So we rely on the complicated calculations.

Calculations proposed three curved shapes for our universe. Negative curvature, zero curvature and positive curvature.

Zero curvature shape:


In zero curvature shape, the universe is tow dimensional. Here only lines are possible(parallel and perpendicular).
In this case the universe has only that much mass which is just enough to cause expansion and stop after an infinite amount of time. The rate of expansion of the universe will gradually decrease and finally stop at some infinite instant of time. This means that the universe will expand and will never come back to its previous shape. It will not collapse. This shape is called flat universe(euclidian universe).





Positive curvature shape:


If the universe is of positive curvature, there is more than enough mass to stop the expansion of the universe at present. Here the universe is finite but its ends are infinitely away. Here the expansion of the universe will stop soon and will collapse at high rate( reverse of expansion). Very soon all the bodies in the universe will collide with each other as the space between them will vanish. The universe in this shape is called closed universe.

Negative curvature:


Now, if the universe have a negative curve shape, this is called open universe. Here there is insufficient mass to stop the expansion and the universe will stop forever. Very soon everything in the universe will fall apart.


After years of devoted studies conducted by the scientists, it is found and so long believed that the universe is flat with exact amount of mass having the expected density parameter 1.


For any questions, feedback and suggestions , feel free to comment.