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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 A Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through ThemA Tubeless, or 'Aerial' TelescopeThumbnailsA Diagram of a Stream of Meteors Showing the Earth Passing Through Them

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