Leo triplet
2014-03-28 
See more information here for the night this picture was taken. 
A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and dark matter. Examples of galaxies range from dwarfs with as few as ten million stars to giants with one hundred trillion stars, each orbiting their galaxy's own center of mass. ― source and more information wikipedia
Date: 2014-03-28 / 21:27:08 UTC
Location: Ekerö, Sweden
Temperature: -2 °C
Telescope: William-Optics Megrez 88FD
Camera: Canon 600D
ISO: 800
Mount: Skywatcher NEQ6 Pro Synscan
Exposure time: 117 X 45 sec
Reducer/flattener: William-Optics 0.8X reducer/flattener (P-FLAT-F6)
Other info: Autoguided with 50mm guidescope and QHY5-II. Used PHD2 (2.2.1) guiding software.
Processing: Stacked and darks-subtracted in DeepSkyStacker. Processed in Photoshop CS6.