SETI's 1977 "Wow!" signal from deep space was even stronger than originally thought, but its source remains a complete mystery.

June 22 marks the 350th anniversary of the Royal Observatory Greenwich, the home of the historic Prime Meridian that is considered by many to be the birthplace of modern astronomy. To celebrate, we're ...

Astronomers have discovered that the Seven Sisters of the Pleiades star cluster have more stellar siblings than we thought — a lot more. Using NASA's exoplanet hunting spacecraft TESS (Transiting ...

For decades, scientists have scanned the skies, recording an array of radio waves and electromagnetic bursts from deep space. Most have natural explanations, like pulsars, colliding stars, or solar ...