Study of the Pleiades open cluster: histogram of the parallax and HR diagram of stars belonging to the cluster. Contact: G. Iafrate, iafrate at oats.inaf.it en (master): 2014-01-27 de: 2010-07-14 it: 2014-01-27 fr: 2010-10-07 es: 2010-03-26 pt: 2014-01-27