Tabby's Star
KIC 8462852, known also as Tabby's star or the WTF star (Where's the Flux), is an F-type main-sequence star located in the constellation Cygnus, about 1,480 ly from Earth. Unusual light fluctuations of the star were discovered by citizen scientists as part of the Planet Hunters project. No suitable explanation has been put forth to date for the light fluctuations and new research has raised even more questions.
New research put forward by Bradley Schaefer shows an unusual and steady decline in output from Tabby's star since 1890. The paper can be found here.
Pretty cool mystery. I have a feeling this star will be studied pretty heavily over the next few years...
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