The key to remember if photographing the moon in the sky with no landscape is that the moon is lit by the sun, so just spot meter on the moon. My rule is: If it is a crescent, I just allow it to overexpose. If it is a half to full moon, I want to capture the detail of the moon. There are many variables that can affect exposure (i.e. clouds and pollution in the sky) so have highlight alert turned on (zebras) and adjust accordingly. Also, shoot from a tripod. With my moon shots, I try to blend the full moon with the landscape and have one chance per month on both ends of the day. For sunset, it is usually, but not always, the evening before the full moon and for sunrise, it's generally the morning of the full moon itself. An excellent software for calculating moonrise and moonset relative to your position is The Photographer's Ephemeris. Moon photography is always fun as well as shooting the night sky when the moon is not up.