Like Earth's surface, this model has no edges and would seem to require a closed universe.

Each system is now in effect a closed universe.

These are called, respectively, the flat, open and closed universes.

The closed universe business model has paid dividends for Apple so far, and there?s little reason to believe things will be different in 2005.

"I thought the eschaton only existed in a closed universe."

In a closed universe, he believed that Mach's principle would hold.

Sliced horizontally, it would look like a circle, or a closed universe.

"A closed universe;" he said, and the earlier scorn was lacking.

With a positive cosmological constant, it could also occur in a closed universe.

Relativity predicts that a closed universe contains more matter and energy than a certain fixed amount.

But let us begin with a question: Do you know the difference between an open universe and a closed universe?"

Though stars will still age and die as the closed universe contracts, the background light will blue shift.

A closed universe stars with a big bang (an initial singularity) and expands.

The second law of thermodynamics states that the total entropy in a closed universe will never decrease.

Does a closed universe have a mass?

Cosmologists have contemplated two alternatives to a closed universe.

Initially the no-boundary proposal predicted a closed universe which had implications about the existence of God.

It can display itself without awareness, with absolute confidence, deflecting all argument, content within its closed universe.

In a closed universe, the end point for that approach is a collapse to a point of infinite density, pressure, and temperature.

They pictured a finite, closed universe in the shape of a sphere, only in four dimensions.

A closed universe seems the ultimate doom.

A thunderclap penetrated the closed universe of the doughnut gasbag.

There was no implied criticism, as Ariel continued, "Certain other things become possible in a closed universe.

That points to a closed universe.

Rick supposes the jungle is impossible to leave without a time portal, calling it a "closed universe."