NGC 2736 - The Pencil Nebula

Discovered by Sir John Herschel in 1835, the Pencil Nebula shows the result of a supernova shock wave passing through a region of dense gas. The original star exploded about 11,000 years ago. It's just a small part of the greater Vela Supernova Remnant which measures about 100 light-years in diameter. The Pencil Nebula itself measures about 5 light-years long and about 800 light-years away from us. The shock wave started out traveling at millions of km/hr, but now clocks in at around 500,000 km/hr.

I initially processed this image as an LRGB and is my first attempt at adding in Ha.
LRGB+Ha all subs were 6 x 600 sec.