Pinwheel Galaxy (M 101), close-up
The Pinwheel's arms through a telescope with a focal length of almost 2.8 metres.
This photograph is also available in the shop as a full-resolution digital file.
Buy in the shopAbout the object
The Pinwheel (M101) in Ursa Major lies about 21 million light years away and is around 170,000 light years across – almost twice the size of the Milky Way. The pink knots in its arms are regions where stars are forming right now.
How the image was made
- Captured
- 23 July 2025
- Focal length
- 2 762 mm
- Calibration & stacking
- Siril 1.4.0-beta3
- Processing
- Adobe Lightroom 8.4 (Windows)
Data from the original file’s metadata or from the author.