NASA has finished building the Nancy Grace Roman Space Telescope, completing assembly of the agency’s next flagship ...

Scientists are testing a novel way to measure cosmic expansion using time delays in gravitationally lensed quasars. Their ...

The Nancy Grace Roman Space Telescope has quietly crossed a threshold that turns a long‑planned mission into a near‑term ...

Dark matter is special in that it doesn't emit, absorb or interact with light, so science had to find a more creative way to ...

There is an important and unresolved tension in cosmology regarding the rate at which the universe is expanding, and ...

In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

FROSTI is a new adaptive optics system that precisely corrects distortions in LIGO’s mirrors caused by extreme laser power.