Ah, dark matter. Creator of the universe, sculptor of galaxies, great brewer of coffee (probably). There seems to be nothing it can’t do, or isn’t responsible for, but there’s just one problem: Where ...

A growing mystery in astronomy is the presence of gargantuan black holes—some weighing as much as a billion suns—existing ...

Might the universe we can observe be just half the tale, with a mirror universe moving in reverse through time filling out the narrative? A new and intriguing idea from scientists at the Perimeter ...

No theory could explain the slight excess of far-ultraviolet light in the Milky Way until now.

Somewhere in the distant universe, light from a quasar bends around a galaxy and reveals a dark clump so compact it should ...

Only a small part of the universe consists of visible matter. By far the largest part is invisible and consists of dark matter and dark energy. Very little is known about dark energy, but there are ...

Dark matter, though invisible, weighs heavily on how we understand the universe. Its gravity sculpts galaxies, holds clusters together, and shapes cosmic evolution—yet we still don’t know what it is.

NASA's Hubble Space Telescope captures the magnificent starry population of the Coma Cluster of galaxies, one of the densest known galaxy collections in the universe — and where the effect of dark ...

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The original version of this story appeared in Quanta Magazine. The end is brutal for electrons hurtling at 99.9999999 percent of the speed of light through SLAC National Accelerator Laboratory’s ...