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NGC 7129 (Reflection Nebula)


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NGC 7129
Reflection Nebula (反射星雲)
Nb OCL+RN


別名 (Other names)
OCL 240, LBN 497

星座 (Constellation)
ケフェウス座 (Cep) (Cepheus)


距離 (Distance)
3,000光年 (3,000 light-years)

NGC 7129 is a reflection nebula located 3,000 light years from the Earth in the constellation Cepheus.

NGC 7129 (Reflection Nebula) : Picture

Young Suns of NGC 7129
Young Suns of NGC 7129
(C) Johannes Schedler (Panther Observatory)
Young suns still lie within dusty NGC 7129, some 3,000 light-years away toward the royal constellation Cepheus. While these stars are at a relatively tender age, only a few million years old, it is likely that our own Sun formed in a similar stellar nursery some five billion years ago. Most noticeable in the sharp image are the lovely bluish dust clouds that reflect the youthful starlight. But the compact, deep red crescent shapes are also markers of energetic, young stellar objects. Known as Herbig-Haro objects, their shape and color is characteristic of glowing hydrogen gas shocked by jets streaming away from newborn stars. Paler, extended filaments of reddish emission mingling with the bluish clouds are caused by dust grains effectively converting the invisible ultraviolet starlight to visible red light through photoluminesence. Ultimately the natal gas and dust in the region will be dispersed, the stars drifting apart as the loose cluster orbits the center of the Galaxy. At the estimated distance of NGC 7129, this telescopic view spans about 40 light-years.

Young Suns of NGC 7129
Young Suns of NGC 7129
(C) Bob and Janice Fera (Fera Photography)

Young Suns of NGC 7129
Young Suns of NGC 7129
(C) Robert Gendler

NGC 7129 and NGC 7142
NGC 7129 and NGC 7142
(C) Tony Hallas
This alluring telescopic image looks toward the constellation Cepheus and an intriguing visual pairing of dusty reflection nebula NGC 7129 (left) and open star cluster NGC 7142. The two appear separated by only half a degree on the sky, but they actually lie at quite different distances. In the foreground, dusty nebula NGC 7129 is about 3,000 light-years distant, while open cluster NGC 7142 is likely over 6,000 light-years away. In fact, the pervasive and clumpy foreground dust clouds in this region redden the light from NGC 7142, complicating astronomical studies of the cluster. Still, NGC 7142 is thought to be an older open star cluster, while the bright stars embedded in NGC 7129 are perhaps a million years young. The telltale reddish crescent shapes around NGC 7129 are associated with energetic jets streaming away from newborn stars. Surprisingly, despite the dust, far off background galaxies can be seen in the colorful cosmic vista.

NGC 7129 NGC 7129
NGC 7129
(C) Johannes Schedler
NGC 7129
(C) Bob and Janice Fera
NGC 7129 NGC 7129 and NGC 7142
NGC 7129
(C) Robert Gendler
NGC 7129 and NGC 7142
(C) Tony Hallas
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NGC 7129 (Reflection Nebula) : Movie

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