For years, cosmologists have argued over a simple question with an awkward answer: How fast is the universe expanding right ...

Astrophysicists propose a new “stochastic siren” method using the gravitational-wave background from black hole mergers to ...

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

We have known for several decades that the universe is expanding. Scientists use multiple techniques to measure the present-day expansion rate of the universe, known as the Hubble constant. These ...

Hubble constant. The Hubble constant is crucial in understanding the rate of expansion of the universe and, by extension, estimating the universe’s age. This collaborative effort unites various ...

It's well established that the universe is expanding, but there's serious disagreement among scientists over how fast it's happening.

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.

Scientists discovered a distant jellyfish galaxy with star-forming "tails" stretching back 8.5 billion years.

Origins -- Spaceship Hubble -- Hubble vision -- Planets -- Stars & nebulae -- Galaxies -- Black holes -- The dark cosmos -- Optical illusions -- Hubble's future ...