
1) Astronomer 2) Philosopher 3) Stargazer 4) Uranologist
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https://www.crosswordclues.com/clue/anaximander
[crater] Anaximander is a lunar crater that is located near the northwest limb of the Moon. It is joined at the northern rim by the crater Carpenter, a younger and better-defined formation. To the southeast is the much larger J. Herschel, a formation of the variety known as a walled plain. The outer wall of Anaximander is heavily worn and e...
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http://en.wikipedia.org/wiki/Anaximander_(crater)
noun a presocratic Greek philosopher and student of Thales who believed the universal substance to be infinity rather than something resembling ordinary objects (611-547 BC)
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https://www.encyclo.co.uk/local/20974

(6th Cent. B.C.) With Thales and Anaximenes he formed the Milesian School of Greek Philosophy; with these and the other thinkers of the cosmological period he sought the ground of the manifold processes of nature in a single world-principle or cosmic stuff which he identified with 'the Infinite'. He was the first to step out of the realm of experi....
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https://www.encyclo.co.uk/local/21203

611?–547? b.c., Greek astronomer and philosopher.
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https://www.infoplease.com/dictionary/anaximander
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