Casper The Friendly Ghost Nebula (ウルトラマンの故郷) Messier 78

This is the first time I have taken a picture of this nebula. Somehow the telescope didn't turn.
There are three reasons for pointing the telescope.
(1) Request from Mr. Sawada, a friend living in Thailand
(2) Request from a friend of Hong Kong, Johnny
(3) I saw many pictures of M78, but I couldn't understand the origin of the name Casper The Friendly Ghost Nebula.
I took it myself, edited it, and immediately found out the origin of the name. A ghost is sitting in the middle.
In most of the photographs, this part was overexposed and the inside could not be seen, so the origin of the name was unknown.

Place: Backyard East Pattaya (Bortle Class 6, Moon Phase 22.7%)
Shot Date:8th / Dec / 2021 1:42 (UTC+7) Start
TS RC10 Truss Prime Focus (250mm F/8 f/2000mm)
filter: Optolong L-Pro
25X300Sec 125minutes
Total 2 Hours 5 minutes
Palette: OSC RGB
Gain: 3300, Offset 100,BIN1
CCD: QHY128C Pro
Filter: Optolong L-Pro
Mount :iOptlon CEM70G
Guide: SVbony 60mm/ F/4 f/240mm , ZWO ASI120mm-Mini
Pre-Processing APP
Post-Processing PI,PS
Shot By Taro Seki