It's nice to see more people interested in astrophotos
I thought I was alone
I was shooting stars with 35mm cameras for many years until i lately got digital. It's much more easier to see your results in time.
Antman I think that Long Exposure Noice Reduction on D80 get's automatically on for exposures over iso800. Check it out though.
Keep in mind the exposure settings that u will need to shoot the moon is very different than the one you used for the stars. (I don't know if u already know this).
Also try to lower the iso e.g to 800 to reduce the noise and use longer exposures up to 30 seconds.
Get ready for the perseids meteor shower in middle August, very interesting event to grab a lucky shot with a meteor if you are interested