New measurement of Universe’s expansion

The Atacama Cosmology Telescope just released its measurements of the cosmic microwave background. The inferred expansion rate of the universe agrees with the ones of previous Planck missions.

This is interesting insofar as the question of the rate of the expansion is one of cosmology’s biggest mysteries right now. Measurements from the early universe and measurements of later times derived from i.a. supernova data do not agree. So this new measurement gives additional credibility to the old Planck data, making experimental error increasingly unlikely.

The Hubble tension as its called gets tenser and tenser.

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