Milkyway:
M27 08-July-1989
C8 working at f10, Hypered TP2415, 40 minutes, 5 min D19 dev.
Light travel time: 1250 years
The gas in M27 shines by flourescence radiation activated by radiation form the 13th-magnitude central star.
With a surface temperature of about 85000 K the central star surface is almost 15 times hotter than the surface of the sun (5800 K).
