Messier 101, the Pinwheel galaxy

This giant spiral disc of stars, dust and gas measures 170,000 light-years in diameter, which is nearly the double of the diameter of our Milky Way. It is estimated that Messier 101 contains at least one trillion of stars (10^12).

Astro-Physics 92 Stowaway refractor, ZWO ASI 2600 MM-Pro camera. Total exposure time: 9 hours.