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 ...

The light of a supernova that has traveled for 10 billion years to reach us has given us a new measurement of the Hubble constant – the accelerating rate at which the Universe is expanding. Called SN ...

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 ...

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 ...

Orbit decay accelerates as solar activity rises, with no approved mission yet to raise the telescope's altitude A newly released plot of the Hubble Space Telescope's altitude shows just how quickly ...

Forbes contributors publish independent expert analyses and insights. Amanda Kooser covers the quirky side of science and space. IN SPACE: (FILE PHOTO) In this handout from the National Aeronautical ...