What is the real shape of the universe?

The observable universe can be thought of as a sphere that extends outwards from any observation point for 46.5 billion light-years, going farther back in time and more redshifted the more distant away one looks.

Does the universe loop?

Instead of being flat like a bedsheet, our universe may be curved, like a massive, inflated balloon, according to a new study. So it’s been largely rejected in favor of a “flat universe” that extends without boundary in every direction and doesn’t loop around on itself.

Will the universe eventually stop expanding?

The universe will eventually stop expanding and start collapsing in on itself, the so-called “Big Crunch.” If the density of the universe is less than this critical density, then the geometry of space is ” open ” and “negatively curved” like the surface of a saddle.

What is the shape of the universe at a point in time?

To speak of “the shape of the universe (at a point in time)” is ontologically naive from the point of view of special relativity alone: due to the relativity of simultaneity we cannot speak of different points in space as being “at the same point in time” nor, therefore, of “the shape of the universe at a point in time”.

Is the universe flat or curved?

This is termed a flat universe or a Euclidian universe (because the usual geometry of non-curved surfaces that we learn in high school is called Euclidian geometry). If space has positive curvature, there is more than enough mass to stop the present expansion of the universe.

Why does the universe have no limits?

Answer: If space has no curvature (i.e, it is flat), there is exactly enough mass to cause the expansion to stop, but only after an infinite amount of time. Thus, the universe has no bounds and will also expand forever, but with the rate of expansion gradually approaching zero after an infinite amount of time.