Iris nebula and dusty ghosts in Cepheus (Leo Shatz)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: Iris Nebula · LBN 475 · LBN 483 · LBN 487 · LBN 495 · LDN 1167 · LDN 1168 · LDN 1170 · LDN 1171 · LDN 1172 · LDN 1173 · LDN 1174 · LDN 1177 · NGC 7023 · Sh2-136 · T Cep · VdB139 · VdB141

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Iris nebula and dusty ghosts in Cepheus

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Iris nebula and dusty ghosts in Cepheus

This image has been selected as the Astronomy Picture of the Day - Haunting the Cepheus Flare

These cosmic clouds in Cepheus have blossomed 1,300 light-years away. Located near center of this field, the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers, though. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photo luminescence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The pretty blue petals of the Iris Nebula span about six light-years.

The dusty ghosts in the right side of this field are close to the edge of the Cepheus Flare molecular cloud complex. Over two light-years across and brighter than the other spooky chimeras, VdB 141 or Sh2-136 is also known as the Ghost Nebula, seen at toward the bottom of the featured image. Within the reflection nebula are the telltale signs of dense cores collapsing in the early stages of star formation. A protostar can be seen forming at the lower right end of the nebula. The V-shaped projection is one side of the bipolar outflow induced by the protostar's rotating accretion disk. Light from the protostar itself can be seen feebly glowing at the vertex of the V. The opposite bipolar outflow exiting the opposite side of the nebula can just be glimpsed to the left of the bright yellow star above the nebula.

Text sources:
APOD, cs.astronomy.com

Original
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E

Takahashi Refractors
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Status	Advanced success
Started	...
Astrometry.net job	5351328
PixInsight job	EE3M49MDPY391X4R857I46H5MJLIWJT9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h03m52s.55
RA (top/left)	20h48m14s.66
RA (top/right)	21h19m31s.74
RA (bottom/right)	21h20m55s.61
RA (bottom/left)	20h46m48s.46

Dec (center)	+68°00′23″.2
Dec (top/left)	+66°57′01″.2
Dec (top/right)	+66°57′06″.5
Dec (bottom/right)	+68°57′43″.6
Dec (bottom/left)	+68°57′35″.7

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Iris nebula and dusty ghosts in Cepheus

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