7-year eclipse reveals 'exceptionally rare' binary system :

Astronomers have discovered that the 7-year dimming of a distant star was caused by it being eclipsed by a strange dusty stellar companion, probably a white dwarf.

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United States , American , James Davenport , Anastasios Tzanidakis , University Of Washington , Harvard University , Dirac Institute , American Astronomical Society , Zwicky Transient Facility , Epsilon Aurigae , Astronomical Society ,