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

Astronomers have long known the universe is expanding—but exactly how fast remains one of the biggest mysteries in cosmology.

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

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

Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the ...

Scientists propose a gravitational-wave method called the stochastic standard siren to measure the Hubble constant, offering an independent way to examine the universe’s expansion and the Hubble ...

Drawing together leading experts from across the field, an international collaboration of cosmologists has created a unified approach for measuring the value of the Hubble constant. Published in ...

A subtle gravitational-wave “hum” from merging black holes may help settle the cosmic fight over how fast the universe is ...

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 ...

A closer look at the Lambda Cold Dark Matter model, its core components, supporting evidence, and why new observations are ...

Cosmology is puzzled as to why two methods for measuring the expansion of the cosmos yield different results. A third method is now expected to help.

A new study has estimated the universe’s possible age by using precise data on stars.