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A Map of the Chief Plains and Craters of the Moon

A Map of the Chief Plains and Craters of the Moon.jpg The Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian FormThe Copernican theory of the Solar SystemThumbnailsThe 'Ring with Wings.' - Assyrian Form

The plains were originally supposed to be seas: hence the name "Mare."