The bubble of expanding gas pictured above is the planetary nebula PK 164 +31.1, the remnants of the atmosphere of a Sun-like star expelled as its supply of fusion-able core hydrogen became depleted.
Visible near the center of the nebula is what remains of the core itself -- a blue-hot white dwarf star.
This particularly photogenic planetary nebula shows intricate shells of gas likely expelled at different times toward the end the star's demise.
In the image several galaxies far in the distance can be seen.
PK 164 +31, also known as Jones-Emberson 1, lies about 1,600 light years away toward the constellation Lynx. (text from http://www.ign.com )

If you look at the image at full resolution - you can see several galaxies inside the shell!!!
This is the Second image with the ASA 10" F3.8 Telescope.

L Ha - HaR-GB image
HA for 90 min Bin 1
Luminance for 90 min Bin 1
RGB 10 minutes per channel Bin 2

Total of 3:30 Hrs

Mount - ASA DDM 60 PRO
NO GUIDING :)
Camera - SBIG ST8300M with BAADER filters.
Imaged from my home observatory in Gan-Yavne (HA data)
NEGEV desert in Israel (LRGB)