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Alkyone is a blue star, the brightest of the Pleiades. The Pleiades are the famous Seven Sisters. This name the open stellar cluster bears although at least 9 of the more than 200 stars from it are visible to the naked eye. The stars were all born at the same time out of the nebula which still surrounds them.

Constellation: Taurus
Age: 80 million years
Distance: 407 light-years
Spectral class: B7
Visual magnitude: 2.87
Luminosity: 1400 * Sun
Mass: 7 * Sun
Diameter: 8 * Sun
Radial velocity: 10 km/sec

Back: List of big and giant stars
Extract from the Pleiades, Alkyone is the brightest star. To the lower left is Merope.
Photo: Anglo-Australian Observatory/Royal Obs. Edinburgh

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