Due to the very cloudy winter, I have not enough unitary images due to the faint nebula.
Abell 31 (also known as
Sh2-290 or
PK 219+31.1[1]) is an ancient
planetary nebula in the
constellation of Cancer. It is estimated to be about 2,000
light years away. Although it is one of the largest planetary
nebulae in the sky, it is not very
bright. The central
star of the planetary nebula is a
white dwarf with a
spectral type of DAO.
[2] The white dwarf is the
dead remains of a
star that existed but had died leaving behind Abell 31 and the white dwarf.
[3]Abell 31 is made mostly of
hydrogen and
oxygen gas with the red
gas signifying hydrogen gas and the
blue gas signifying the oxygen gas. The
nebula has a blue central region being most of the nebula and a
red ring around this blue region. The nebula due to its ancient
age has its
gas being dispersed into the
interstellar medium.
[4]source:
https://en.wikipedia.org/wiki/Abell_31 
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