The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

Cosmologists are quietly confronting a possibility that would have sounded absurd a generation ago: the standard picture of a ...

Add Yahoo as a preferred source to see more of our stories on Google. This NASA/ESA Hubble Space Telescope image features the spiral galaxy Messier 77, also known as the Squid Galaxy. Everything on ...

The scientists realized that these supernovae weren’t as nearby as they had thought, so they had zipped away from Earth ...

Learn how Hubble is measuring the expansion rate of the Universe in this new explainer from NASA's Goddard Space Flight ...

The standard explanation has been dark energy, an invisible force added into the equations to make the math work. But now, an ...

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding? Astronomers have tried two main methods to figure it out, but their numbers don’t ...

Researchers in Germany argue that a modified theory of gravity could explain universal expansion, removing dark energy from ...

Scientists propose a new gravity theory using Friedmann equations. Their model explains the universe’s accelerating expansion ...

Scientists have made a new calculation of the speed at which the universe is expanding, using the data taken by the powerful new James Webb Space Telescope on multiple galaxies. Above, Webb’s image of ...