A hypothetical planet whose orbit is said to lie between Mercury and the Sun, about twelve million miles from the Sun. Astronomers have no evidence of this planet as yet.
A hypothetical planet supposed to lie inside the orbit of Mercury, but always on the opposite side of the Sun from the Earth, making it invisible. Originally postulated to account for perturbations in planetary orbits, this planet is no longer supposed to exist by science, although some astrologers claim it as a sort of spiritual entity having power in a horoscope.
Vulcan is an intra-Mercurial planet orbiting the Sun every 18.6 days. The nature of Vulcan is combustible, fiery, explosive, and ethereal. Vulcan rules wind conditions, gases, gas-producing combustible materials like petrol and gun-powder etc. The existence of Vulcan has never been confirmed scientifically.
Vulcans are a humanoid species in the fictional Star Trek universe who reside on the planet Vulcan and are noted for their attempt to live by reason and logic, with no interference from emotion. They were the first extraterrestrial species encountered by the human population of Earth, and later became one of the founding members of the United Federation of Planets.
In the fictional Star Trek universe, Vulcan, or Vulcanis, is a reddish Minshara-Class planet orbiting the star 40 Eridani A, 16 light years from Earth, and is the homeworld of the Vulcans.
Vulcan (Gabriel Summers) is a fictional character in the Marvel Comics universe. He first appeared in X-Men: Deadly Genesis #1, and was created by Ed Brubaker and Trevor Hairsine. He is also the younger brother of X-Men Cyclops and Havok.
Vulcan, is a fictional character from DC Comics, he is the second character to star in a book titled Son of Vulcan. The first was Johnny Mann, who was created by Charlton Comics in 1965 and later purchased by DC Comics in 1983.
Vulcan was a weekly comic book published by Fleetway from 1975 to 1976.