PSO J0309+27 spewed a fast-moving jet of radiation and plasma into the cosmos. Almost 13 billion years later, the jet is visible to humans through a blazar.
How supermassive black holes formed over billions of years have remained a mystery to astronomers for years. A recent discovery of six galaxies and a supermassive black hole forming a cosmic web may explain its origins.
Planets outside the Solar System, or exoplanets, have been continuously discovered since 1995. Now, scientists report that the first planet from another galaxy was just discovered using X-ray images from 2012.
Scientists answered how the Magellanic Stream from two small galaxies that entered the Milky Way could have gained mass that is a billion times more massive than the sun.