Astronomy Photos 
 17. I took a second image of M51 about a year after the first to see if I could see the super nova that erupted there. Sure enough, there it is! Here is the comparison between the two images.
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| Optics: | 6 inch Schmidt Cassegrain, 1500mm focal length, f/10 9.25 inch Schmidt Cassegrain, 2350mm focal length, f/10 |
| Mount: | CG-5 ASGT CGEM DX |
| Camera: | Canon XTi, not modified |
| Filters: | None |
| Exposure: | 22 x 240 seconds, iso 1600 12 x 240 seconds, iso 1600 |