Roughly 80 percent of the mass of the universe appears to be dark matter: an invisible material that seems to interact with ordinary matter only through gravity, without emitting light or energy. Scientists cannot detect dark matter directly and don't yet know what it's made of, but they track its influence based on the motions of stars and galaxies. The presence of dark matter is necessary to explain the universe's current structure.
Astronomers recently completed the first test run of the nearly-complete Dark Energy Spectroscopic Instrument (DESI)
You might not recognize Peebles' name, but he theorized the existence of dark matter and has been a key player in painting the portrait of the universe that we now understand.
The Nobel Prize in physics this year has gone to two very different research threads — and danced around some big societal issues, even as they celebrate distinguished work.
Physicists have proposed that a trio of particles called Higgs bosons could be responsible for the mysterious vanishing act of antimatter in the universe.
Two theoretical physicists propose a novel idea to find dark matter — and it might actually be testable.
Physicists on the hunt for the invisible hand that shapes our universe and the galaxies within it have turned their gaze to the dark side.
An experiment to seek out dark energy, or the so-called "fifth force," has come up empty-handed, casting doubt over some theories related to the mysterious cosmic matter.
Nobody has stumbled into an emergency room with an inexplicable lightsaber wound, as far as we know — and that tells us something about dark matter, a new study suggests.
The secrets of the universe are so important that NASA plans spacewalk work to fix a dark matter experiment on the space station, said U.S. astronaut Jessica Meir.
There are voids in the universe, and we can't see them properly. But the good news is that astronomers just got much better at not seeing them properly.
Tiny ripples called magnons could lure even a fleeting, lightweight dark matter particle out of hiding.
We can't see it. It might not be made of normal matter. Our telescopes haven't directly detected it at all. But it sure seems like it's out there.