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A Map of the Chief Plains and Craters of the Moon

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A Map of the Chief Plains and Craters of the Moon.jpg Diagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemDiagram Showing the Main Layers of the SunThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through Them

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