Astronomy

Why methane on Mars is a sign of something extraordinary.

Life on other planets will likely have these telltale signatures.

Why the search for alien technology is about to get much more efficient.

A camera lens often used by wildlife and sports photographers has helped astronomers learn about dark matter and galaxy formation.

The first star map from the ESA’s Gaia space telescope is poised to revolutionize our understanding of the Milky Way galaxy.

Every point in the sky contains part of a galaxy.