floating at a distance of some 5,200 light years from Earth
measures roughly 130 light years in diameter.
The radiation from the young stars forming inside it - excite the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see.
The mass of the nebula is estimated to be around 10,000 solar masses.(WIKIPEDIA)

IMAGED THROUGH CANON 400MM F2.8 LENS
HA FILTER FOR 1 HOUR - Meade DSi pro 3
RGB for 30 min - canon 450d
imaged from the 101 kilometer in Israel