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Credit & Copyright: Steve
Cannistra
(StarryWonders)
Explanation:
This wide-field
telescopic image looks toward the constellation
Cepheus
and an intriguing visual pairing of dusty
reflection nebula
NGC 7129 (right) 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, pervasive and clumpy foreground dust clouds in
this region redden the light from NGC 7142,
complicating astronomical
explorations 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 few million
years young.
The telltale reddish crescent shapes around NGC 7129 are associated with
energetic jets streaming away from newborn stars.
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NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: reflection nebula - open cluster
Publications with words: reflection nebula - open cluster
See also: