Long before we invented the clock, the calendar, or the telescope, we had the sky. An immutable tapestry of lights spinning ...

Observing this distant epoch is notoriously difficult, astronomers say. At that time, the universe was filled with a dense ...

A new theory promises to simplify our approach to the universe's earliest moments, but some cosmologists say further ...

Globular clusters like NGC 1786 are tightly packed groups of stars, often containing hundreds of thousands of stars bound ...