06 Jul 2021
This is an image of M101, also known as the Pinwheel Galaxy. It is a face-on spiral galaxy about 21 million light-years away in the constellation Ursa Major. It is about 170000 light in diameter with over a trillion stars, making it about twice the size of the Milky Way.
M101
13 credit
Filter | Avg Exp (s) | Total Exposure | Subframes |
|---|---|---|---|
| Luminance | 211 | 3h42m | 63 |
| Blue | 150 | 2h38m | 63 |
| Green | 143 | 2h30m | 63 |
| Red | 153 | 2h38m | 62 |
| Halpha | 29 | 30m | 62 |