Astronomers have given one of Einstein’s predictions on gravity its most stringent test yet. By precisely tracking the meanderings of three stars in a single system — two white dwarf stars and one ultra-dense neutron star — the researchers determined that even phenomenally compact neutron stars ‘fall’ in the same manner as their less-dense counterparts, an aspect of nature called the ‘Strong Equivalence Principle.’
Even phenomenally dense neutron stars fall like a feather
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