One of these regions would become what we now see as the observable universe.

Other strings could stretch all the way across the observable universe.

There are probably more than 100 billion (10) galaxies in the observable Universe.

It is the largest and the most massive structure known in the observable universe.

Quasars are found near the edge of the observable universe.

In the observable Universe there are roughly a hundred billion galaxies.

There are probably over 170 billion (1.7x10) galaxies within distance we can see or the observable universe.

The observable universe would actually shrink, as if surrounded by a black hole.

Back in the observable universe, however, Hawking's life is getting no easier.

By comparison, the number of atoms in the observable universe is estimated at about 10.

They are known to occur at great distances from earth, near the limits of the observable universe.

The spatial region within which we can affect and be affected is the observable universe.

IT took 13 billion years for light to travel from the edge of the observable universe to Earth.

The behavior of matter and energy throughout the observable universe appears to follow well-defined physical laws.

The observable universe was actually only a very small part of the actual universe.

The observable universe is estimated to be 880 Ym in diameter.

Strictly speaking, the observable Universe depends on the location of the observer.

There the observable universe is brought indoors, reduced to a more comprehensible size.

The cause, they suggest, is the gravitational attraction of matter that lies beyond the observable universe.

This sample includes objects up to 6 billion light-years - or nearly half of the observable universe - away.

Sagan's number is the number of stars in the observable universe.

What is the mass of the observable universe?

There are about 10 fundamental particles in the observable universe, by rough estimation.

This hypothesis relies on the vast size and consistent physical laws of the observable universe.

Two approximate calculations give the number of atoms in the observable universe to be close to 10.