How many moons?
Discoveries of new satellites of the outer planets are being made all the time. For the most up-to-date information, go to NASA's planetary fact sheet, which should be kept up to date:
Astronomy software
For a listing of a wide range of astronomy software, go to
http://nineplanets.org/astrosoftware.html
Feedback
If any of the links on this site or in the book fails to work, or you have any comments to make, please email me.


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