Featured Maps: Second Blue Moon of 2010 (29 March 2010)

If you live at least eight hours east of GMT (Perth and Beijing and points east -- plus all of China, which is a single time zone), you are in for a rare treat mid-day on 30 March: the second Blue Moon of the year. Double Blue Moons typically occur only four or five times in a century.

Of course you won't be able to see the full moon at mid-day, but you can use the Great Circle Mapper to explore the moon:

Viewing the western hemisphere is interesting as doing so shows the contrast between the Earth-facing moon on the right and the heavily-cratered far side on the left. Readily visible is the distinctive Mare Orientale, resembling a bull's-eye, which is barely out of view from Earth.

Even if your travels are closer to Earth, the Great Circle Mapper can help you explore where you might land.