And talking of the moon, I am working on an Android moon maps app. I am not so interested in making a planetarium app, as I am holding out for an Android version of SkySafari.
This has now been officially released in the Android Market:
here. If you want to purchase the HD version after that, email me.
Requires Android 1.5.
I will update this post in the comments as needed with new features. The beta version expires at the end of the 2011 calendar year.