Yhn SciencePhysics first seen 1 d ago, last 54 min ago, peak #4
Triplet of ghostly galaxies offers clues about dark matter
Original: Triplet of 'ghostly' galaxies hints at what dark matter is and isn't
A Quanta Magazine report examines three faint, 'ghostly' galaxies whose strange properties are shedding light on what dark matter may actually be. The galaxies appear to contain far more dark matter than ordinary matter, and their behavior is helping scientists rule out some competing theories about the mysterious substance that makes up most of the universe's mass.
Why now: The findings constrain leading dark matter theories, a longstanding open question in physics and cosmology.
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