Here's a quick Gimp made moon with circle and ellipse:
PieterP:
(keep in mind that a circle is just a special ellipse).
But it is easier to draw a circle ...
westfw:
This is really annoying me. I feel like there ought to be a relatively simple and elegant equation for drawing this, but I can't visualize it
I think so.
aarg:
Here's a quick Gimp made moon with circle and ellipse.
Did you draw it or Gimp make it ? If you draw it, thank you for your work.
I have already dowloaded : m000.jpg to m360.jpg (step = 2) from
https://www.almanac.com/sites/default/modules/moon/images/
PieterP:
You could also use GIMP, it has a batch mode to perform the same operations on multiple images. It supports pretty much any image format.
X'nView works fine also
Please go and check my solution, you might find what you are looking for 