
These Binary Stars Are So Close Together That Their Year Is Only 20.5 Hours Long - ScienceAlert

A team of astrophysicists has discovered a binary pair of ultra-cool dwarfs so close together that they look like a single star.
A team of astrophysicists has discovered a binary pair of ultra-cool dwarfs so close together that they look like a single star.
They're remarkable because they only take 20.5 hours to orbit each ot… [+5049 chars]
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