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Astronomy and space

Astronomy and space

(Courtesy: Mikkel Juul Jensen/Science Photo Library)
08 Jul 2020
Taken from the July 2020 issue of Physics World.

The Planck mission gave us the most precise value of the Hubble constant to date by measuring the cosmic microwave background. But studies made since using different methods provide different values. Keith Cooper investigates the discrepancies and asks what it might mean for cosmology

When astronomer Edwin Hubble realized that the universe is expanding, it was the greatest cosmologic

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