The universe is vast, a size beyond what many of our imaginations can deal with, but modern technology helps shine a light.

Pinpointing a Milepost Marker Star that Opened the Realm of Galaxies At the dawn of the 20th century, astronomers faced a ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New ...

A new perspective on the universe could emerge if superluminal observers, those who theoretically move faster than light, ...

Quasars are among the oldest, brightest objects in the universe. Formed from active galactic nuclei ... toward us—a cone in ...

Like stretch marks left on skin that expanded too quickly or cracks embedded in freezing ice, cosmic strings are artifacts of ...

The early universe experienced a phase of rapid expansion, known as inflation. For decades, cosmologists assumed that this ...

Astronomers have traced two mysterious fast radio bursts from space to wildly different places, which suggests the phenomenon ...

Although they don't impact the surface directly, historical evidence and simulations suggest airbursts can pack a punch.

In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...

New research confirms the Universe is expanding faster than theoretical models predict, intensifying the Hubble tension.

This is called the “heat death” of the Universe, but you can think of it instead as the death of heat. There will be no more differences in temperature anywhere, which means thermodynamics shuts down, ...