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Dark Matter Falls to Gravity, Future Tests Await

11/7/2025

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Summary

Story summary

Researchers from the University of Geneva and the University of Portsmouth find that dark matter falls into gravitational wells like ordinary matter.
The results support that dark matter generally obeys gravity, but they do not rule out a hidden force weaker than 7% of gravity.
Future surveys, including the Legacy Survey of Space and Time and the Dark Energy Spectroscopic Instrument, could yield more precise tests.

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Story summary

Researchers from the University of Geneva and the University of Portsmouth find that dark matter falls into gravitational wells like ordinary matter.
The results support that dark matter generally obeys gravity, but they do not rule out a hidden force weaker than 7% of gravity.
Future surveys, including the Legacy Survey of Space and Time and the Dark Energy Spectroscopic Instrument, could yield more precise tests.