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Letter: For the record - 17 February 2018

Published 14 February 2018

• The inconstant moon: its orbit is inclined 5 degrees to the ecliptic, the plane of Earth's orbit around the sun (28 November 2015, p 13).

Issue no. 3165 published 17 February 2018

Â鶹´«Ã½ issue 3165 cover

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