NGC 40 a nice planetary nebula

[elpajare]

NGC 40 is composed of hot gas around a dying star. The central star has ejected its outer layer which has left behind a hot, white dwarf core with a surface temperature about 50,000 degrees Celsius; radiation from this star heats the outer layers to about 10,000 degrees.

SKYWATCHER 8" f/4

15x10" + Infinity color

[Moonshane]

Very nice! I sketched this for the first time this year

[Galen Gilmore]

Nice! What are your exposure times? 

[elpajare]

Thanks to all for comment and very nice sketch Moonshane.

I used 15 expo. of 15seconds each one, stacked with the Infinity software.