Contents

- 1 Is the observable universe a sphere?
- 2 Is the universe a 4D sphere?
- 3 How do we know the universe is a sphere?
- 4 Is space flat or curved?
- 5 How many universes are there?
- 6 What is the edge of the universe?
- 7 What is the 7th dimension?
- 8 What is a 4th dimensional being?
- 9 Does 4th dimension exist?
- 10 Does the universe end?
- 11 How many dimensions do we live in?
- 12 Is our universe open or closed?
- 13 Why is the universe so flat?
- 14 Is there a bottom to space?
- 15 How many dimensions are there?

## Is the observable universe a sphere?

The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×10^{26} m).

## Is the universe a 4D sphere?

The Universe is a 4D sphere W = r + Ix + Jy + Kz = [f, V ] The universe is defined by energy W = -vh/2pir + cP where -vh/2pir = -vp = -mv^2, a real number potential energy.

## How do we know the universe is a sphere?

Very broadly, general relativity would allow the universe to have one of three shapes: flat, closed, or open. Two beams of light initially parallel would gradually spread apart, turning slightly away from each other as they traverse the cosmos. Closed space is generally spherical.

## Is space flat or curved?

As far as cosmologists can tell, space is almost perfectly flat. But what does this mean? The theory of general relativity, under which space itself can curve, allows for the universe to take one of three forms: flat like a sheet of paper, closed like a sphere, or open like a saddle.

## How many universes are there?

There are still some scientists who would say, hogwash. The only meaningful answer to the question of how many universes there are is one, only one universe.

## What is the edge of the universe?

The edge simply marks the dividing line between locations that earthlings can currently see and locations that we currently cannot. And although our observable universe has an edge, the universe as a whole is infinite and has no edge.

## What is the 7th dimension?

In the seventh dimension, you have access to the possible worlds that start with different initial conditions. The eighth dimension again gives us a plane of such possible universe histories, each of which begins with different initial conditions and branches out infinitely (hence why they are called infinities).

## What is a 4th dimensional being?

A Fourth-Dimensional Being is a being that resides in a “fourth dimension” in a science fictional sense. This idea of a “fourth dimension” is somewhat based on the scientific concept of dimensions. This idea of dimensions is an attempt to give the Slender Man a pseudoscientific basis for his movement abilities.

## Does 4th dimension exist?

There is a fourth dimension: time; we move through that just as inevitably as we move through space, and via the rules of Einstein’s relativity, our motion through space and time are inextricable from one another. A visualization of a 3-torus model of space, where our observable Universe could be just a small

## Does the universe end?

It never ends, but it’s also constantly expanding. Scientists don’t think there is a true edge of the universe. This is called the edge of the observable universe. It’s the farthest we can see, based on how we get information from light.

## How many dimensions do we live in?

In everyday life, we inhabit a space of three dimensions – a vast ‘cupboard’ with height, width and depth, well known for centuries. Less obviously, we can consider time as an additional, fourth dimension, as Einstein famously revealed.

## Is our universe open or closed?

This is known as an open universe. The shape of the universe depends on its density. If the density is more than the critical density, the universe is closed and curves like a sphere; if less, it will curve like a saddle.

## Why is the universe so flat?

The usual explanation of the universe’s formation includes a period just after the big bang called inflation, when the universe rapidly expanded. Our current models of inflation naturally lead to a flat universe, so if the universe is actually closed, they would have to change.

## Is there a bottom to space?

The Bottom of the Universe. The universe has a bottom. That bottom extends infinitely outward and has an infinite sky above it, with an infinite number of stars and galaxies. The bottom is remarkably terrestrial, with gravity, mountains, lakes, forests, and sunshine, each of which deserves additional discussion.

## How many dimensions are there?

The world as we know it has three dimensions of space —length, width and depth—and one dimension of time. But there’s the mind-bending possibility that many more dimensions exist out there. According to string theory, one of the leading physics model of the last half century, the universe operates with 10 dimensions.