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

Two new studies have measured the expansion of the universe in our immediate cosmic neighborhood using a novel method that ...

Astronomers studying the Milky Way's oldest stars have estimated that the Universe is about 13.6 billion years old.

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

The oldest stars in the Milky Way are forcing a fresh look at one of cosmology’s biggest arguments. If some of them are about ...

NASA has released a huge new report that astronomers are calling Hubble’s magnum opus. Analyzing 30 years of data from the famous space telescope, the new study makes the most precise measurement yet ...

Vesto Slipher first observed that galaxies are moving away from us. Edwin Hubble later showed a relationship between galaxy distance and speed. Hubble's work relied heavily on Slipher's earlier data.

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

Astronomers have made new measurements of the Hubble Constant, a measure of how quickly the Universe is expanding, by combining data from the Hubble Space Telescope and the James Webb Space Telescope.