Messier 45 – Pleiades

Messier 45 - Pleiades by Miroslav Horvat

Messier 45 - Pleiades by Miroslav Horvat

Miroslav Horvat

Maderkin breg, Croatia

Optical system: SW ED80, SW 0.85 FF/FR
Camera : QHY8c
Mount and guiding: SW EQ6Pro, SW 9×50 finderguider with QHY5L-IIc
Exposure: 9x20min, Gain 4%, Offset 123, dark, flat
Software: Nebulosity3 Pixinsight 1.8, PS-CS6

the Pleiades or Seven Sisters are 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 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, but is now known to be an unrelated dust cloud in the interstellar medium, through which the stars are currently passing.