Pleiades and Hyades are the most famous star clusters in Northern
Hemisphere which can be seen by the naked eye in the constellation Taurus
the bull. The star cluster surrounding Aldebaran (the eye of the bull) is the
Hyades. Pleiades (NGC 1432; M45; Melotte 22; Seven Sisters) is more
famous than Hyades because it is more compact cluster and easy seen, higher
in the sky (~ 10 degrees from Aldebaran), see Fig 1. Pleiades is located at J
(2000) α = 03h: 47m: 24s; δ = +24o: 07’: 12’’; G. long. = 166.642o and G. lat. o
= -23.457 . The distance to the Pleiades is an important first step in the so- called cosmic distance ladder, a sequence of distance scales for the whole universe. The optical photometry catalogs of Webda and Dais refer to Pleiades as a rich young cluster located at 135-150 pcs away from Earth. In optically observations, Pleiades covers a diameter of about 110 arcmin on the sky; its core and tidal radii are about 33 and 330 arcmins respectively.
