Ultracool dwarf binary stars break records
Astrophysicists have discovered the tightest ultracool dwarf binary system ever observed. The two stars are so close that it takes them less than one Earth day to revolve around each other. In other words, each star’s “year” lasts just 20.5 hours.
United States Chris Theissen Chih Chun Dino Hsu Adam Burgasser Chih Chin Dino Hsu Northwestern Center
Source: northwestern.edu