The hunt for the universe’s “missing matter” may finally be over — and it’s exactly where simulations predicted. Breakthrough Discovery: Hidden Matter Revealed in Cosmic Web Astronomers have detected a colossal hot gas filament connecting four galaxy clusters in the ...

A galaxy is unfathomably huge, as it usually contains hundreds of billions of stars. But since the Universe is much bigger, so big that nobody knows for sure where its boundaries are, there’s no telling if it could be a ...