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New Studies Suggest Slower Universe Expansion and Less Dark Matter

3/17/2026

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Summary

Story summary

The local universe may be expanding more slowly than previously thought, addressing the Hubble tension.
Two studies measured the Hubble constant using the motion of Centaurus A and M81, finding H0 = 64 km/s/Mpc.
The results imply less dark matter may be needed, and future work will apply this method to a broader region using data from the 4-meter Multi-Object Spectroscopic Telescope (4MOST) in Chile.

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Story summary

The local universe may be expanding more slowly than previously thought, addressing the Hubble tension.
Two studies measured the Hubble constant using the motion of Centaurus A and M81, finding H0 = 64 km/s/Mpc.
The results imply less dark matter may be needed, and future work will apply this method to a broader region using data from the 4-meter Multi-Object Spectroscopic Telescope (4MOST) in Chile.