A cosmic chameleon shows off its bright colors in a new image from the European Southern Observatory (ESO).
Seen by NASA's Chandra X-ray Observatory, this peaceful galaxy cluster existed when the universe was just 5.8 billion years old and brimming with chaos.
Astronomers have discovered a massive galaxy that does not seem to contain dark matter, a cosmic puzzle that could challenge theories surrounding the evolution of the universe.
Astrophotographer Miguel Claro captured an incredible panoramic image of the Milky Way from the Lut (Dasht-e Lut) desert in Iran.
While routinely scanning the sky for the burnt-out remnants of dying stars, scientists stumbled upon a strange cosmic signal.
Astronomers have observed a 'slow' magnetar releasing bursts of radio waves every 22 minutes. The strange neutron star could change our perception of these extreme stellar corpses.
Astronomers have found the first evidence of a so-called 'Trojan planet,' in the form of a young Jupiter-like world that's being tailed by a cloud of dust twice as massive as Earth's moon.
A powerful magnetic neutron star, or magnetar, "glitched" when it destroyed an asteroid, causing it to blast out a fast radio burst and change rotational speed.
A dying red giant star and the remains of a stellar companion it shredded long ago have created a rare and short-lived planetary nebula that resembles an overflowing cosmic jug.
The galactic bulge at the heart of the Milky Way is haunted by the ghosts of dead stars spread out as a mysterious arrangement of planetary nebulas.
Data from the closest cosmic supernova explosion to Earth for 10 years was collected by a record number of observers for SETI, showing what the collective power of citizen scientists can achieve.
A dazzling new photo from the Hubble Space Telescope shows a distant galaxy that hosted a supernova explosion not long ago.
The James Webb Space Telescope spotted three objects that may be 'dark stars,' or stars that are powered by dark matter. But follow-up work is needed to learn their nature.
Astronomers have discovered an ultracold brown dwarf, a "failed star" smaller than Jupiter and colder than a campfire that is emitting radio waves.
The Hubble Space Telescope captured massive galaxy clusters in the process of merging to form one big 'cosmic monster' eight billion light-years from Earth.
Astronomers have found a missing link in the evolution from stars in binary systems to colliding neutron stars, in the form of stripped, intermediate-mass 'helium stars.'
Look to the western skies on Monday evening (July 10) to see the Red Planet, Mars, shining steadily above the twinkling blueish star Regulus.
A new unpublished study is making waves on the internet, claiming that one of the brightest stars in the night sky might die in a spectacular explosion within our lifetime.
Do you want that toasted? A newly suggested planet formation process suggests smaller worlds could be created when a gas and dust filling is squeezed between two larger planets.
Astronomers have now deduced what alien scientists might see when they gaze at the Milky Way from afar. Our home galaxy is unusual but not unique, at least when it comes to chemistry.