deeplook.at
Messier 45 wide field in Taurus

Astrophotography from Ursa Major Observatory @ ROSA

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deeplook.at
deeplook.at
2017-11-15+17
Sigma Art 135mm F1.8 DG HSM @ f/2.8
10micron GM1000 HPS
23x2 min ISO 400
1h 09min
Camera:
Nikon D850
Image acquisition by CEDIC team (Christoph Kaltseis, Bernhard Hubl, Markus Blauensteiner) Image processing by Christoph Kaltseis
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Open star cluster (I3r) with reflection nebula
Tau
110’
1.6 mag
440  Ly
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.