Astrophotography by David Gares

Triangulum Galaxy M33

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M33, the Triangulum Galaxy, is a difficult target in the city.  I can't see it visually in the telescope here, but even under better skies it's tough because its light is distributed over a broad area (roughly twice the apparent size of the moon).  You need dark skies and a scope with a wide field of view like the new Tak (or perhaps large binoculars).  I managed to capture its core on CCD below.
This galaxy is a member of our Local Group.  The larger knots in its spiral arms are emission nebulae that have NGC numbers of their own (a couple of these can be seen below).  The Triangulum Galaxy has a total mass equivalent to 10 to 40 billion solar masses.

 Triangulum Galaxy M33
(Click image to enlarge)


 Object Details:  
 Type:  Spiral Galaxy
 Constellation:  Triangulum
 Distance:  3 million light-years
 Diameter:  50,000 light-years

 Image Details:
 Date:  August 14, 2004
 Site:  Harahan, LA
 Exposure:  CCD, 10 x 5 min.
 Filters:  Orion SkyGlow LPR
 Processing:  MSB Astroart 3.0
 Telescope:  10" Meade LX200
 Reducer:  Meade, f/4.3
 CCD:  Starlight Express MX7C
 Autoguider:  S.T.A.R. 2000