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W Cygni is a semi-regular variable star in the constellation Cygnus, located 618 light-years from Earth. [1]

3 relations: Cygnus (constellation), Red giant, Semiregular variable star.

Cygnus is a northern constellation lying on the plane of the Milky Way, deriving its name from the Latinized Greek word for swan.

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A red giant is a luminous giant star of low or intermediate mass (roughly 0.3–8 solar masses) in a late phase of stellar evolution.

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Semiregular variable stars are giants or supergiants of intermediate and late spectral type showing considerable periodicity in their light changes, accompanied or sometimes interrupted by various irregularities.

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References

[1] https://en.wikipedia.org/wiki/W_Cygni

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