(much-studied quadruple star system)
GG Tau (or GG Tauri) is a star system combining a number
of characteristics that make it useful for study.
It is a quadruple system made up of two binary stars,
and for being binaries, more accurate mass estimates
can be made than otherwise.
It includes a T-Tauri star, and the entire system
is surrounded by a massive circumstellar disk.
Being close enough for good observation,
it is an interesting lab for planet formation
theories and study.
(star,binary star,disk,protostar,variable star)
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variable star designation