In today's image, we see great stone statues or mo'ai on Easter Island. The observatories here were used by the peoples of Polynesia to help navigate between the Polynesian islands in the Pacific.
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This Podcast is an authorized New Media Mirror Site for APOD. You can access the image and website directly at: Astronomy Picture of the Day. You can use the archive link below the image to select the photo corresponding to the date of this podcast.
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