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33.0 MB (4.8 MB compressed)
3462 x 3331 pixels
29.2 x 28.2 cm ⏐ 11.5 x 11.1 in (300dpi)
SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Orbit of the Earth. Historical artwork showing the Earth revolving around the Sun. The Earth takes around 365 days to complete a full orbit of the Sun. The orbit is not perfectly circular, instead it is elliptical. The Earth is tilted on its axis as it rotates, and this gives rise to the changing seasons. When the North Pole points away from the Sun it is winter in the northern hemisphere, and when it points towards the Sun it is summer in the northern hemisphere. From The Popular Encylopedia; or, Conversations Lexicon, which was published around 1879.
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