A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

Scientists have revised the timeline for the approach of the rogue star Gliese 710, which is now expected to enter the solar system sooner than previously thought. This accelerated timeline has raised ...

There’s a bit of a paradox about our galaxy: it’s both jam-packed with stars and cavernously empty. The Milky Way is crowded in the sense that it holds hundreds of billions of stars, as well as ...