...Or the seven daughters of Atlas and the nymph Pleione. They are star nymphs and I already depicted one here: (More) Greek nymphs
They were companions of Artemis and also sisters of the Hyades, the rain nymphs. There are two stories about why they became stars.
1. After his father's death, Zeus "catasterized" them because they made a suicide pact to be together in heaven. So tragic but so beautiful (that's Greek mythology for ya
2. When Atlas was forced to carry the heavens on his shoulders, he could not protect his daughters from Orion, the mighty hunter, and so Zeus transformed them into doves, and then into stars, so that him (another beautiful constellation) could not catch them. Still, he chases after them in the sky every night.
In astronomy, it is an open star cluster located in the constellation of Taurus.
Y si el anhelo te lleva a navegar en mares tormentosos,
cuando las Pléyades huyan del poderoso Orión
y se hundan en las brumosas profundidades
y todos los borrascosos vientos rujan,
no sigas entonces con tu barco en el oscuro mar
sino, como te pido, recuerda trabajar en tierra.