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.

 

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