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Vulcan in a lithographic map from 1846 [1] Vulcan (/ ˈ v ʌ l k ən /) [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, intermercurial bodies or planets date back to the beginning of the 17th century.
Orbit Customer Launch outcome 1 8 January 2024 07:18 Vulcan Centaur VC2S: Cape Canaveral, SLC‑41: Peregrine lander: 1,283 kg (2,829 lb) TLI: Astrobotic Technology: Success [3] Enterprise (space burial) Heliocentric: Celestis: Maiden flight of Vulcan Centaur and Vulcan Centaur VC2S Configuration.
The following January, ULA was designing two versions of the Vulcan first stage; the BE-4 version has a 5.4 m (18 ft) diameter to support the use of the less dense methane fuel. [20] In late 2017, the upper stage was changed to the larger and heavier Centaur V, and the launch vehicle was renamed Vulcan Centaur. [41]
In 2008, optimistic hopes were that this rocket, known as SLV (Satellite Launch Vehicle) would first be launched in Indonesia in 2012, and if there were extra funds pursuant to the good economic situation of 2007–2008, possibly in 2010. In fact, the LAPAN budget for 2008 and 2007 was Rp 200 billion (approximately US$20million).
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 RL10 is a liquid-fuel cryogenic rocket engine built in the United States by Aerojet Rocketdyne that burns cryogenic liquid hydrogen and liquid oxygen propellants. Modern versions produce up to 110 kN (24,729 lb f) of thrust per engine in vacuum.
The name "Vulcan" has been used for various other fictional planets, in and out of the Solar System, that do not correspond to the hypothetical planet Vulcan, which was theorized by Urbain Le Verrier to orbit the Sun closer in than Mercury. The planet Vulcan in the Star Trek franchise, for instance, is specified as orbiting 40 Eridani A.
A vulcanoid is an asteroid in a stable orbit with a semi-major axis less than that of Mercury (i.e. 0.387 AU). [7] [17] This does not include objects like sungrazing comets, which, although they have perihelia inside the orbit of Mercury, have far greater semi-major axes. [7]