Charlie Summers / Long-exposure night photography reveals the rotation of the Earth, producing star trails centred on the Northern Circumpolar Star, Polaris. Toadstool State Park, Nebraska.
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Charlie Summers / Long-exposure night photography reveals the rotation of the Earth, producing star trails centred on the Northern Circumpolar Star, Polaris. Toadstool State Park, Nebraska.
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Philippe Clement / 17th century Copernican, armillary sphere / spherical astrolabe, a spherical framework of rings, centred on the Sun
