Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  Sh2-155
Sh2-155 Cave Nebula, Gebhard Maurer
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Sh2-155 Cave Nebula

Sh2-155 Cave Nebula, Gebhard Maurer
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Sh2-155 Cave Nebula

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Description

The Cave Nebula makes a very pretty picture with red emission nebula, blue and yellow reflection nebulae, dark nebulae and many colourful stars. This object lies in the constellation Cepheus about 2,400 light years away, pretty close in cosmic terms. The nebula’s bright rim is ionized by the hot blue-white stars in the vicinity, primarily the bright star left of centre in this image. The main “cave” structure is 10 light years across. It is catalogued as Sharpless 155 (Sh2-155) and also as Caldwell 9 (the Caldwell catalogue was compiled by Sir Patrick Moore, and named for his mother’s maiden name).

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Sh2-155 Cave Nebula, Gebhard Maurer