Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)
Dark nebula Barnard 150 , copalegio
Dark nebula Barnard 150
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Dark nebula Barnard 150 , copalegio
Dark nebula Barnard 150
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Description

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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  • Dark nebula Barnard 150 , copalegio
    Original
  • Dark nebula Barnard 150 , copalegio
    B
  • Final
    Dark nebula Barnard 150 , copalegio
    C

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Dark nebula Barnard 150 , copalegio