The Triangulum Galaxy is a spiral galaxy approximately 3 million light-years from Earth in the constellation Triangulum.
With a diameter of about 60,000 light-years, the Triangulum galaxy is the third largest member of the Local Group of galaxies.
Triangulum may be home to 40 billion stars, compared to 400 billion for the Milky Way, and 1 trillion stars for Andromeda Galaxy.
M33 is linked to M31 by several streams of neutral hydrogen and stars, which suggests that a past interaction between these two galaxies took place from 2 to 8 billion years ago, and a more violent encounter will occur 2.5 billion years in the future.

Technical info:
TS 80mm f6 APO triplet refractor -
Canon 40D + IDAS LPS-P2 (light pollution) filter
Exposure 146x 300sec during 4 nights
Total 13 hours

Re-processed in Astro Pixel Processor