Concept

Ecliptic

Overview

apparent path of the Sun on the celestial sphere

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

Found by search and not yet checked by a person; they may only mention the idea in passing.

As the Moon revolves in an ellipse, which has the centre of the {381} Earth in one of its foci, the longer axis of its orbit is called the Line of its Apsides. This line is found, by observation, not to be always directed towards the same points of the Firmament, but to revolve forwards from west to east, so as to pass through all the points of the Ecliptic, and to complete its period in about nine years; another…
Adam Smith, The Essays of Adam Smith
States what Ecliptic is; names Ecliptic.
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But the human race does not alone afford evidence of the violent heat in these regions; it is shown also by all other animals and by the state of the surrounding atmosphere. The natives of those countries which lie under the more remote northern parallels (that is to say, under the Arctic circle and beyond it[68]) have their zenith far distant from the zodiac and the Sun’s heat. Their constitutions, therefore…
Ptolemy, Ptolemy's Tetrabiblos
States what Ecliptic is; opens on Ecliptic.
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It is a cloudy circle, which continually appears in the air, and by reason of the whiteness of its colors is called the galaxy, or the milky way. Some of the Pythagoreans say that, when Phaeton set the world on fire, a star falling from its own place in its circular passage through the region caused an inflammation.
Plutarch, Complete Works of Plutarch — Volume 3
States what Ecliptic is.
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