designed by Lluís Romero Ventura
The Earth astrosirius@astrosirius.org

M45 THE PLEIADES OPEN CLUSTER

In astronomy, the Pleiades or Seven Sisters (Messier 45 or M45), is an open star cluster containing middle-aged, hot B-type stars located in the constellation of Taurus. It is among the nearest star clusters to Earth and is the cluster most obvious to the naked eye in the night sky. The celestial entity has several meanings in different cultures and traditions. The cluster is dominated by hot blue and extremely luminous stars that have formed within the last 100 million years. Dust that forms a faint reflection nebulosity around the brightest stars was thought at first to be left over from the formation of the cluster (hence the alternative name Maia Nebula after the star Maia), but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing. Computer simulations have shown that the Pleiades was probably formed from a compact configuration that resembled the Orion Nebula. Astronomers estimate that the cluster will survive for about another 250 million years, after which it will disperse due to gravitational interactions with its galactic neighborhood.

M45 THE PLEIADES

Place: Ager-Lleida-Spain SQM: 21.4 - 21.6 Dates: 18-19-23 DECEMBER 2016 Details Telescope: GSO RC14 Truss Mount: ASA DDM85 Camera: Moravian G3-11000 Focuser: Feather Touch 3 Kit Boss II Flattener: TS 2.5 Exposure: L:31x120 sec bin1 RGB: 27:19:19 x 120 sec bin1 Processing: Pixinsight & Photoshop CC Software: MaximDL, Sequence,Autoslew Control Remote: Talon6

Cluster

& Stars