The Pinwheel Galaxy (also known as Messier 101 or NGC  5457) is a face-on spiral  galaxy about 27 million light-years  away in the constellation Ursa  Major.
It was discovered by Pierre Méchain on March 27, 1781, and he subsequently  communicated his discovery to Charles Messier who verified its position and added it to  the Messier Catalogue as  one of the final entries.
M101 is a relatively large galaxy compared to the Milky  Way. With a diameter of 170,000 light-years it is nearly twice the  size of the Milky Way. It has a disk mass on the order of 100 billion  solar masses, along with a small bulge of about 3 billion solar masses.
W.O FLT-110 with dedicated field flattener 
EQ6 Pro
ST10XME
Lum    : 100min
Red    : 40min
Green : 40min
Blue    : 40min
5min subs
Total exposure 3h40min
Every day our eyes catch the light of our memories – time spent with family, the journey to work, a special holiday, a beautiful sunset or a dark starlit night. Each image captured is a picture drawn in light – a photograph: only to be lost in our minds or forever forgotten. Nearly two hundred years ago a small group of amateur scientists achieved what had eluded mankind for centuries – the ability to capture a permanent record of an image seen by their own eyes – a moment in time frozen onto a surface. They had discovered Photography. They were the ‘Catchers of the Light’.
 
 
