Space-based X-ray observations of hundreds of galaxy clusters suggest that the Universe may be different depending on which way astronomers look. The study...
Astronomers using NASA’s Chandra X-ray Observatory have spotted an unusual outburst activity in the center of SPT-CLJ0528-5300 (SPT-0528 for short),...
Using data from NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton, the Giant Metrewave Radio Telescope, and the Apache Point Observatory, astronomers...
Using a technique called quasar microlensing, a team of astronomers at the University of Oklahoma has detected populations of free-floating planet-mass...
Supermassive black holes in the center of galaxy clusters usually suppress star formation, but the one in the Phoenix Cluster, a group of about 1,000 galaxies...
An effect called strong gravitational lensing has allowed the NASA/ESA Hubble Space Telescope to see the same remote galaxy twelve times. Called PSZ1 G311.65-18.48,...
The European Southern Observatory (ESO) has released a gorgeous new image taken by ESO’s Very Large Telescope (VLT) of a giant elliptical galaxy called...
Using data from NASA’s Chandra X-ray Observatory, astronomers have created detailed maps of Abell 1758, a collision between two pairs of galaxy clusters,...
Astronomers using ESO’s Very Large Telescope (VLT) have discovered an enormous black hole at the center of Holmberg 15A, a supergiant elliptical galaxy...
Astronomers using the Low-Frequency Array (LOFAR) telescope network have detected a vast ridge of radio emission connecting the merging galaxy clusters...
A spectacular new image from the NASA/ESA Hubble Space Telescope shows SPT-CL J0615-5746, a very massive group of galaxies located approximately 7.7 billion...
A long streamer of hydrogen gas is being stripped from a spiral galaxy called D100 as it plunges toward the center of the Coma cluster (also known as Abell...
When the Universe was less than 1 billion years old, some of its stars turned into supermassive black holes. A key mystery in astronomy has been: why are...
SDSS J0928+2031, a huge group of galaxies in the constellation of Leo, is so massive that its strong gravity bends light like a giant lens.
This Hubble...
Dark matter is a mysterious substance that makes up about 85% of the matter in the Universe. It does not emit any kind of electromagnetic radiation and...
Globular clusters are ancient groups of hundreds of thousands or even millions of stars, gravitationally bound into a single structure about 100-200 light-years...
Astronomers using data from NASA’s Chandra X-ray Observatory have determined that a massive group of galaxies called Abell 1033 is actually two galaxy...
Galaxy clusters are some of the most massive objects that can be found in the Universe. A new image from the NASA/ESA Hubble Space Telescope shows one...
