M101 Pinwheel Galaxy

The Pinwheel Galaxy is a face-on spiral galaxy in the constellation Ursa Major roughly 21 million light-years away from Earth.

This giant spiral disk of stars, gas and dust is 170,000 light-years across (almost twice the diameter of our Milky Way galaxy) and is estimated to contain at least one trillion stars.

Constellation Ursa Major

Distance about 23 million light-years from Earth