"The Unparalleled Adventure of One Hans Pfaall" (1835) tells the story of a voyage to the Moon by balloon; along the way it discusses zodiacal light, the inclination of the Moon's orbital plane, and possible explanations for secular changes in the orbit of Encke's Comet. In a signature scene at the beginning of Poe's "Murders in the Rue Morgue" (1841), as the characters walk through Paris they cast their "eyes upward to the great nebula in Orion." Poe remarks on the immense distances to the stars and the light-travel times from Sirius and 61 Cygni in his footnotes to various editions of "The Thousand-and-Second Tale of Scheherazade" (1845 and 1850).
In his notes to the tale, Poe scholar Thomas Mabbott also argued that Poe might have been interested in Encke's Comet, because "its periodicity had been calculated," it had returned in 1838, and it "was expected again in 1842."
Just for the fun of it Googling a runner Encke 3.00 Doncaster Encke's Comet
completes an orbit of the Sun once every three years - the shortest period of any known comet.
The comet has been called Encke's comet ever since, the name going to the orbit-establisher rather than to the discoverer.
Encke's comet, the second to have its orbit established, returned to the neighborhood of the Sun every three and a third years.
are as much annoyed at the continued existence of Encke's Comet as at its peculiar behavior.
A new mathematical theory for the perturbing effect of Jupiter's attraction showed that Encke's Comet does not keep the same plane for long periods of time.
"Dots [in the accompanying graph] represent absolute magnitudes of Encke's comet
at each observed return since 1786....