22  September  2016
            Dark nebula Barnard 150           

 By     Alessandro Pensato and Giosi Amante

Imaging telescope or lens: SkyWatcher Newton 200/1000 BlackDiamond
Imaging camera: QHYCCD QHY8L
Mount: SkyWatcher EQ6 belt-modded
Guiding telescope or lens: Geoptik 50/200 mm finderscope
Guiding camera: QHYCCD QHY5-M
Software: APT - Astro Photography Tool APT 3.10,  Pleiades Astrophoto Pixinsight 1.8, 
Giovanni Benintende All Plate Solve,  Cartes du Ciel Cartes Du Ciel
Accessory: EQMod
Resolution: 1600x1036
Dates: July 31, 2016,  Aug. 1, 2016,  Aug. 2, 2016,  Aug. 3, 2016,  Aug. 4, 2016
Frames: 111x600" -25C bin 1x1
Integration: 18.5 hours

Barnard 150 (B150) dark nebula is a type of interstellar cloud that is so dense that it obscures the light from the background
 emission or reflection nebula or that it blocks out background stars. The extinction of the light is caused by interstellar dust grains located in the coldest,
densest parts of larger molecular clouds. The form of such dark clouds is very irregular as they have no clearly defined outer boundaries and sometimes take
 on convoluted serpentine shapes. The largest dark nebulae are visible to the naked eye, appearing as dark patches against the brighter background of the Milky Way.
In the inner regions of dark nebulae important events take place, such as the formation of stars and masers.

B150 is also known as the Seahorse Nebula. With a bit of imagination the dark nebula shown in the image above roughly
 outlines the shape of a seahorse with its head pointing downward as it floats in a sea of stars roughly 2 degrees wide in the northern sky.    


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