Vulcan (/ ˈvʌlkən /) [2] was a proposed planet that some pre-20th century astronomers thought existed in an orbit between Mercury and the Sun. Speculation about, and even purported observations of, …

Oct 19, 2023 · After rigorously examining Edmond’s data, Le Verrier, in 1860, officially announced to the world the discovery of Vulcan, the planet between Mercury and the Sun.

May 30, 2024 · Astronomers have found that signals interpreted as signs of a world orbiting a star called 40 Eridani A, or HD 26965 – the star around which the planet Vulcan orbits in the sci-fi franchise Star …

Sep 18, 2025 · While Vulcan was never found, the concept captured the imagination of both scientists and the public. It also contributed to the development of modern astrophysics and the understanding …

1 day ago · On January 2, 1860, French astronomer Urbain (often spelled Urban) Le Verrier announced what he believed to be the discovery of a new planet orbiting closer …

Sep 12, 2017 · But despite the fact that most reputable astronomers couldn’t find a planet or even an asteroid belt where Vulcan should be, the speculation persisted.

The “wobble” in the orbit of Mercury (seen here) was thought to be the result of the gravitational tug of an undiscovered planet called Vulcan, which didn’t exist.

Jan 26, 2024 · Star Trek fans will know it as the fictional home of Vulcanians, but Vulcan was also the name of a hypothetical planet that many astronomers believed in up until the early 1900s. Vulcan …

May 25, 2025 · Today, the International Astronomical Union has reserved the name “Vulcan” for the “hypothetical” planet inside the orbit of Mercury.

Jun 16, 2025 · For over a century, astronomers believed in a planet called Vulcan—until Einstein proved it never existed. This poetic, historical-science post explores belief, error, and the beauty of being …