What is at the center of the expanding universe?

The universe, in fact, has no center. Ever since the Big Bang 13.7 billion years ago, the universe has been expanding. And so, without any point of origin, the universe has no center. One way to think about this is to imagine a two-dimensional ant that lives on the surface of a perfectly spherical balloon.

Is the observable universe sphere?

The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×1026 m).

How much of the observable universe is empty space?

Voids, vast expanses of nearly empty space, account for about 80 percent of the observable universe.

How did we discover the observable universe?

The landmark Hubble Deep Field, taken in the mid-1990s, gave the first real insight into the universe’s galaxy population. Subsequent sensitive observations such as Hubble’s Ultra Deep Field revealed a myriad of faint galaxies. This led to an estimate that the observable universe contained about 200 billion galaxies.

Why is the observable universe a sphere?

Cosmic expansion means that points in space are spreading apart over time. The shape of the universe deals with the shape of space. A spherical balloon can expand as it is inflated, just as a flat rubber sheet can be stretched and remain flat. So our expanding universe could be flat, open, or closed.

Is there more than the observable universe?

They found that the universe is at least 250 times larger than the observable universe, or at least 7 trillion light-years across.

What does it mean that the universe is expanding?

When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. . Photo taken by the Hubble Space Telescope The galaxies outside of our own are moving away from us, and the ones that are farthest away are moving the fastest.

What is the shape of the observable universe?

By definition, the observable universe would be a sphere. In that space marks the edge of the observable universe where the microwave background is from has been moving away from us at pretty much the same same speed in all dimensions.

Does the universe have a center?

However, the galaxies are not moving through space, they are moving in space, because space is also moving. In other words, the universe has no center; everything is moving away from everything else.

Is the universe flat or sphere?

Currently the universe is almost perfectly flat. That makes the observable universe a sphere. No if ends or buts… If someone says something else they either are not applying standard cosmology, or they are confused about the question.