Source: wikibot/vulcan-hypothetical-planet
= Vulcan (hypothetical planet)
{wiki=Vulcan_(hypothetical_planet)}
Vulcan is a hypothetical planet that was once thought to exist in our solar system, specifically between the orbits of Mercury and the Sun. The concept of Vulcan originated in the 19th century as scientists sought to explain certain peculiarities in Mercury's orbit that could not be accounted for by the gravitational influence of the known planets.