Massive glow-in-the-dark cloud of star-forming gas found hiding near solar system. Despite being 3,400 times the mass of the sun and just 300 light-years away, the hydrogen cloud had gone unnoticed ...

The solar system could be packed with 1 million alien visitors, space rocks shaken away from our cosmic neighbor Alpha Centauri, new research has revealed. Skip to main content.

Scientists have traveled to the edges of the solar system, virtually, at least, to capture the most accurate measurements to date of the faint glow that permeates the universe—a phenomenon known ...