For the Pleiades, a fifty- million- year- old cluster, we find classes _ and _ already leaving the main sequence, making the seven bright giants in the "seven sisters."

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The Answer of For the Pleiades, a fifty- million- year- old cluster, we find classes _ and _ already leaving the main sequence, making the seven bright giants in the "seven sisters."

For the Pleiades, a Fifty- Million- Year- Old Cluster, We