Wow thank you for that great information. I dont know how i missed the replies to this thread I must of missed the email reminder.

So what would be the best way to practice on the moon. I am just starting to understand what stacking images is all about but i have yet to try it. How far apart in time are the images taken and how many do you take ? I have the software that everyone seems to be using to put images back together but im waiting to find out about time and all that good stuff.