By Kirk Dougherty | 2025-07-01
Pinwheel Galaxy
On 07/01/2025 12:00 am by Marcy Curran | Cheyenne, Wyoming
The Pinwheel Galaxy (M101) is a face-on, counterclockwise Intermediate spiral galaxy located 21 million light-years from Earth in the constellation Ursa Major. It has a diameter of approximately 252,000 light-years and contains around one trillion stars, It was discovered by Pierre Méchain in 1781 and then Charles Messier verified its position before adding it to his Messier Catalog. It was 101 out of 110 deep-sky objects. The beautiful Pinwheel galaxy is a near-perfect representation of a spiral galaxy.
Seestar S50
Stacked and processed 405 images, 30-seconds each, in Pixinsight. Then tweaked lighting and contrast in Lightroom Classic and cropped the image.