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Schematic diagram of the orbits of the fictional planets Vulcan, Counter-Earth, and Phaëton in relation to the five innermost planets of the Solar System.. Fictional planets of the Solar System have been depicted since the 1700s—often but not always corresponding to hypothetical planets that have at one point or another been seriously proposed by real-world astronomers, though commonly ...
The first time Neptune was mentioned in a work of fiction—then called "Leverrier's planet" after astronomer Urbain Le Verrier whose orbital calculations led to the planet's discovery—was in the 1848 novel The Triumphs of Woman by Charles Rowcroft where an inhabitant of the planet visits Earth. [9] Neptune was usually omitted in the subgenre ...
Neptune is not visible to the unaided eye and is the only planet in the Solar System that was not initially observed by direct empirical observation. Rather, unexpected changes in the orbit of Uranus led Alexis Bouvard to hypothesise that its orbit was subject to gravitational perturbation by an unknown planet.
Fiction set on Neptune (3 C, 6 P) S. ... Pages in category "Fiction about the Solar System" ... Mundane science fiction; N. Nova (novel) P.
‘Almost science fiction’ Of all Earth’s layers, the inner core is the most remote and mysterious. ... model its position and then compare different PKIKP waves that reached the core as it ...
The iconic photo of Earth known as The Blue Marble, taken by the crew of Apollo 17 (1972). This and similar images might have popularized Earth as a theme in fiction. [1]: 138 The overwhelming majority of fiction is set on or features the Earth, as the only planet home to humans or known to have life.
Orbit of the Solar System: 17,200 pc 5.31×10 17: The average diameter of the orbit of the Solar System relative to the Galactic Center. The Sun's orbital radius is roughly 8,600 parsecs, or slightly over halfway to the galactic edge. One orbital period of the Solar System lasts between 225 and 250 million years. [34] [35] Milky Way Galaxy ...
Neptune – eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet. Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and ...