Matter in intergalactic space is distributed in a vast network of interconnected filamentary structures, collectively ...

Copernicus, going against the current belief that the Earth was stationary and at the center of the universe, hypothesized a Sun-centered (heliocentric) universe with a moveable Earth. Further ...

Cosmic inflation is a faster-than-light expansion of the universe that spawned many others. Inflation was invented to explain a couple of features of the universe that are really hard to explain ...