M57 "Ring" Nebula
Gaseous shell (~1 l.y. in diameter) surrounds dead star: a white dwarf (faint star in the center of the nebula). The white dwarf -- a remnant of the star, in fact, dead star's nucleus -- is hot enough to emit powerful ultraviolet radiation. That ultraviolet emission makes surrounding gases to glow.
Night 28th-29th of Jun 2017
Kyiv
North is up.
Setup: SkyWatcher 15075 OTAW / EQ5 motorized(no guiding) + Canon EOS600D
97*30s; ISO=800
Gaseous shell (~1 l.y. in diameter) surrounds dead star: a white dwarf (faint star in the center of the nebula). The white dwarf -- a remnant of the star, in fact, dead star's nucleus -- is hot enough to emit powerful ultraviolet radiation. That ultraviolet emission makes surrounding gases to glow.
Night 28th-29th of Jun 2017
Kyiv
North is up.
Setup: SkyWatcher 15075 OTAW / EQ5 motorized(no guiding) + Canon EOS600D
97*30s; ISO=800
Size of the field is 39.4 x 39.4 arcmin (by nova.astrometry.net). A faint galaxy is visile near the nebula:
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