Aristotle's opinion... that comets were nothing else than sublunary vapors or airy meteors... prevailed so far amongst the Greeks, that this sublimest part of astronomy lay altogether neglected; since none could think it worthwhile to observe, and to give an account of the wandering and uncertain paths of vapours floating in the Aether.

In: David Gregory, The Elements of Astronomy, Physical and Geometrical - A Synopsis of the Astronomy of Comets, Volume 2, 1715 - Printed for John Morphew. 1715