Celestial hemisphere:  Northern  ·  Constellation: Cepheus (Cep)  ·  Contains:  HD216102  ·  HD216425  ·  HD216532  ·  HD216629  ·  HD216658  ·  HD216711  ·  HD216898  ·  HD217035  ·  HD217061  ·  HD217086  ·  HD217099  ·  HD217312  ·  HD217463  ·  HD217657  ·  HD217966  ·  LBN 524  ·  LBN 527  ·  LBN 529  ·  LDN 1215  ·  LDN 1216  ·  LDN 1218  ·  PK110+01.1  ·  Sh2-155
SH2-155 - the Cave Nebula, Yizhou Zhang
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SH2-155 - the Cave Nebula

SH2-155 - the Cave Nebula, Yizhou Zhang
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SH2-155 - the Cave Nebula

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Description

The Cave Nebula (how does it get the name? where is the cave?), SH2-155, is a diffusion emission nebula locates in the Constellation Cepheus, about 2400 light years away from us. It is surrounded by reflective nebula, such as VdB155 to its southeast, and multiple dark nebulae structures.

There is a great amount of details and contrasts in H-alpha channel, and I blended it heavily into luminance to retain them. The processing might went a bit "heavy" because of that. 

#WTO

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SH2-155 - the Cave Nebula, Yizhou Zhang

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SDAA AISIG Group