Earth's Moon Selene, from the Edge of Space

Photograph by NASA Earth Observatory taken above 21.5°N, 113.3°E by International Space Station crew Expedition 13, on July 20, 2006 over the South China Sea.

Earth's Moon Selene wobbles!

Geocentric phase, libration, position angle of the axis, and apparent diameter of the Moon throughout the year 2011, at hourly intervals.

For more information, visit nasa.gov/