Mare Crisium and Palus Somni

Mare Crisium is one of my favorite Moon areas. There is a lot of details inside Crisium, but it is not easy to detect, because it is very fine. High aperture telescopes are needed to spot the small impact craters inside this maria, because its typical lengths are 1 or 2 kilometers wide.

Near Mare Crisium there is another big area called Palus Somni (below), that is visible in this picture made with an amateur telescope. The big and bright crater in the middle is Proclus:

The telescope used is a Celestron Nexstar 5SE and the camera is a Canon EOS 450d (Rebel XSi) DSLR. The picture actually is a mosaic made of two panes.

2 Responses to “Mare Crisium and Palus Somni”

  1. Vincenzo Fiorentini Says:

    your moon shots are great. as you used a 5 inch, may I be able to get something similar with a 4 inch ? Are you using eyepiece projection or just DSLR on the focuser ? And most of all, how do you focus so well ?!!

    thanks, Vincenzo

    • computerphysicslab Says:

      Focus is a matter of chance and patience. If you try enough eventually you’ll get a sharp focus. Sure, with a 4 inch telescope, results could be almost identical. I used eyepiece projection. Another option is attaching DSLR to the focuser but reflector telescopes use to need a Barlow lens to reach focus.

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