The Lagoon Nebula, M8,
aka NGC 6523, is a fine
example of an emission
nebula within Sagittarius.
About 5000 lightyears
distant, and 140 lightyears
across, it is a region of
active star formation, with
that activity concentrating
centrally in an area known
as the "hourglass" nebula
(can you see it?) An open
cluster of stars, NGC    
6530, seems to be part of
the Lagoon, but probably
sits just in front of it. Alas,
the Lagoon is practically
invisible to most denizens
of the northern USA, given
its very low position in the
southern sky (which,
at least for me, is an area
severely compromised by
the light pollution from
Philadelphia, only 30 miles
to the souththwest.
Takahashi FSQ106
SBIG ST10XME
CFW8 with standard
RGB filters plus
Astrodon 6nm Ha

(HaGB)(HaR)GB:

Ha:   15min x 24, 1x1
      5min x  2,  1x1
R:      10min x 7, 1x1
G:      10min x 5, 1x1
B:      10min x 7, 1x1

Processed with CCDsoft,
Registar, Neat Image,
and Adobe Photoshop
 M8 -- The Lagoon Nebula
  Click on image to enlarge