Most massive galaxies have black holes at their cores that emit energetic particles, heating the galaxy’s gas and dust.

Europe’s Euclid space telescope has detected a rare halo of bright light around a nearby galaxy. The halo, known as an ...

NASA, ESA, Imad Pasha (Yale), Pieter van Dokkum (Yale) The Hubble Space Telescope has captured this striking image of an unusual galaxy with a bullseye structure, as nine rings surround its ...