Questions tagged [science]

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Does the phrase “orbis terrarum” reflect Ancient Roman knowledge that the Earth is a sphere?

Does the phrase orbis terrarum reflect Ancient Roman knowledge that the Earth is a sphere? Some kinds of evidence that might suggest an answer: Did people say orbis terrarum for the world before they ...
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Is Pluto a planet(a)?

Judging by Lewis and Short (and other sources), planeta means a wandering star and was borrowed from Greek. Apparently the word is post-classical, and the classical expression is stellae errantes/...