Could dark matter be black holes?
May 29, 2019
1 minute
CAMILLE M. CARLISLE
NEW OBSERVATIONS LIMIT the role that primordial black holes can play in explaining dark matter.
Even before there were stars, primordial black holes (PBHs) could have been born: When a black hole passes in front of a more distant star, its gravity bends the star’s light toward us, boosting its brightness. No PBHs have been definitively detected yet.
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