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New evidence deepens a mystery around the Hubble constant, one of the most important numbers in cosmology.

The universe is expanding faster today than it did in its infancy, a difference that has set off a search to understand what cosmic forces could be at play. If confirmed, the changing rate—which is nine percent faster than had been projected—would force us to reconsider a fundamental aspect of the cosmos.

The result, announced in a new report publishing in the Astrophysical Journal, marks the latest in a long-running controversy over the Hubble constant, a key measure of the universe's age and expansion rate.

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Arizona City, United States
26.04.2019 (148 days ago)