Black holes that turn matter into energy could explain dark energy and answer two other cosmic questions. Now, the challenge ...

Physicists are scrambling to understand why dark energy is weakening. In a surprising twist, we must now reconsider the ...

Microscopic crystals extracted from meteorites could help settle a debate about the birth of our patch of the Milky Way.

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology. Different techniques for measuring the Hubble constant stubbornly disagree ...

Cosmologist L Sriramkumar said gravitational waves could help scientists understand what happened just fractions of a second after the Big Bang ...

"The polarized light of the cosmic microwave background is sensitive to new physics that violates parity symmetry," the team ...

White noise on televisions and radios contained remnants of the Big Bang. When we saw it on screen during a bad reception or when channels were unavailable, we were unknowingly watching our universe's ...

A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

A new map offers a new perspective on the city, revealing the steady, ever-present natural radiation emerging from the ground ...

It wasn’t long after Dr Laura Manenti landed in Sydney that she realised her new home was rather radioactive.

The Cosmic Background Explorer satellite (COBE) went up on a Delta rocket on Nov. 18, 1989, into a polar sun-synchronous orbit 900 km up. Our team at NASA Goddard Space Flight Center (GSFC), Ball ...

Understanding how massive stars evolve and return energy, momentum, and metals to their surroundings is a central problem in astrophysics, with far-reaching ...