The Hubble constant has changed, once again

This new measurement is based upon measuring the distance to red giant stars in different galaxies

Heroes of Space: Henrietta Swan Leavitt

On this day in 1868 an unsung astronomer, who helped to discover our place in the universe, was born

Using the power and synergy of two space telescopes, astronomers have made the most precise measurement to date of the universe’s expansion rate.

Astronomers using the VISTA telescope at ESO’s Paranal Observatory have discovered a previously unknown component of our galaxy