NGC6905 is known as the “Blue Flash” nebula. It is a planetary lying about 6500 ly away in the constellation Delphinus.

The central star is similar to a Wolf-Rayet and is rich in oxygen. Its original mass is estimated to have been about
that of the sun, and has now shrunk to about 60% of that. Note the lateral “Saturn like” expansion of the nebula.

PlaneWave 12.5″ Astrograph with a ZWO ASI6200 camera, Astrodon filters, and ASA gearless DDM-85 mount. F/8 LRGB
(25/8min L, 9/8min each 2×2 RGB).