Cosmic Inflation

Cosmic inflation is the idea that the very early universe expanded extraordinarily fast for a tiny fraction of a second, stretching space and smoothing the cosmos.

Imagine a tiny wrinkled piece of fabric being stretched enormously in an instant—the stretching smooths out the wrinkles and carries small differences across a much larger space.

Cosmic inflation is a leading scientific hypothesis describing an extremely brief period of accelerated expansion near the universe’s beginning. It may explain why distant regions of the cosmos look remarkably similar and why space appears nearly flat on the largest scales. Inflation would also have stretched tiny quantum fluctuations to cosmic sizes, creating slight differences in density that gravity later developed into stars, galaxies, and vast structures. Scientists continue testing inflation by studying the Cosmic Microwave Background and the large-scale pattern of matter across the universe.