How do you weigh one of the largest objects in the entire universe? Very carefully, according to new research.

The search for the universe's dark matter could end tomorrow—given a nearby supernova and a little luck. The nature of dark matter has eluded astronomers for 90 years, since the realization that 85% ...

Out of the limelight, theoretical physicists continue to seek a mathematical model that can explain the universe's particles and forces.

"It's possible that what happened during inflation runs in reverse, the matter of a massive star becomes dark energy again during gravitational collapse—like a little Big Bang played in reverse." In a ...

"This unique lensing configuration allows us to constrain both the Hubble constant and dark energy parameters simultaneously ...

The big cosmic joke of dark matter is that, although we can’t see it, it apparently makes up the vast majority of all the ...

Dark matter has always been one of the biggest mysteries in astrophysics. The "Dark Big Bang" theory may have the answer.

Distant, ancient galaxies are giving scientists more hints that a mysterious force called dark energy may not be what they thought. Astronomers know the universe is expanding at an accelerating ...

Mr. Gaetz made the decision to pull out after concluding that he would not have the votes in the Senate for confirmation, people close to the matter said. Federal Inquiry Traced Payments From ...