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Astronomy

The Role of Cosmic Inflation in Solving the Flatness Problem

Quick fact

Inflation expanded the universe by a factor of at least 10^26 in less than 10^-32 seconds, smoothing out any curvature in the process.

Why this is interesting

If you blew up a balloon to the size of the observable universe, its surface would look flat. The same stretching happened to our universe — but what caused it?