Categories: Science

Has the biggest problem in cosmology finally been solved?


A spiral galaxy in the constellation of Ursa Major

NASA, ESA, A. Riess (STScI/JHU)

The following is an extract from our monthly Launchpad newsletter, in which resident space expert Leah Crane journeys through the solar system and beyond. You can sign up for Launchpad for free here.

Cosmologists have been fighting over the Hubble constant, a number that represents the rate of expansion of the universe, since before I was born. Now, it may finally be settled.

The debate about the expansion rate of the universe kicked off in the 1970s, when astronomer Gérard de…



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