An international team of researchers led by the Leibniz Institute for Astrophysics Potsdam (AIP) has shed light on a decades-long debate about why galaxies spin faster than expected—and whether this behavior is caused by invisible dark matter or by a collapse of gravity on cosmic scales.
Led by the AIP in collaboration with the University of Surrey, the University of Bath, Nanjing University in China, the University of Porto in Portugal, Leiden University in the Netherlands, and Lund University in Sweden, the study analyzed stellar velocity data from 12 of the smallest and faintest galaxies in the universe to put rival theories to the test.
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