Messier 45 wide field
Exposure time total:
iOptron Sky Tracker
83x1 min ISO 1600
Image acquisition by CEDIC team
(Markus Blauensteiner, Bernhard Hubl, Christoph Kaltseis)
Image processing by Markus Blauensteiner
Nikon AF-S Nikkor 85mm f/1.8G @ f/3.2
Open star cluster (I3r) with reflection nebula
The Pleiades nebulae are blue-colored, which indicates that they are
reflection nebulae, reflecting the light of the bright stars situated near
(or within) them. Physically, the reflection nebula is probably
part of the dust in a molecular cloud, unrelated to the Pleiades cluster,
which happens to cross the cluster's way.
It is not a remainder of the nebula from which the cluster once formed.