Messier 16 + 17 in Serpens
Exposure time total:
Nikon AF-S Nikkor 105mm f/1.4E @ f/2.8
iOptron Sky Tracker
Nikon D810A (ISO 400)
Image acquisition by CEDIC team
(Michael Hanl, Bernhard Hubl, Christoph Kaltseis, Markus Blauensteiner)
Image processing by Michael Hanl
Open cluster + emission nebula
7 000 Ly
The Eagle Nebula (Messier 16) is a conspicuous region of active
star formation, situated in Serpens Cauda.
The starforming nebula, a giant cloud of interstellar gas and
has already created a considerable cluster of young stars.
The cluster is also referred to as NGC 6611, the nebula as IC 4703.
5 000 Ly
The Swan Nebula (Messier 17), also called the Omega Nebula is a
region of star formation and shines by excited emission, caused by
the higher energy radiation of young stars.
Unlike in many other emission nebulae, however, these stars are not
obvious in optical images, but hidden in the nebula.