The reflection nebula NGC 7129 is an open cluster star-forming region containing over 130 very young stars at a distance of 3'300 lightyears. Star forming activity results in a couple of HH objects visible in this image.
In contrast, the open cluster NGC 7142 lies about 6'200 lightyears away and is thought to be old even that it contains many blue stragglers.
Telescope: RCOS 14.5" f/8
Mount: ASA DDM85
Detector: Apogee U16M
Filters: Astrodon Gen 2
Exposures: LRBG 460:100:120:100 min (20 min subs)