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  2. Vulcan (hypothetical planet) - Wikipedia

    en.wikipedia.org/wiki/Vulcan_(hypothetical_planet)

    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.

  3. Vulcan Centaur - Wikipedia

    en.wikipedia.org/wiki/Vulcan_Centaur

    With a single core and six GEM boosters, the Vulcan Centaur can lift 27,200 kilograms (60,000 lb) to low Earth orbit (LEO), [25] surpassing the Atlas V's maximum of 18,850 kg (41,560 lb) with a single core and five GEM boosters, [26] and approaching the 28,790 kg (63,470 lb) capacity of the three-core Delta IV Heavy.

  4. List of Vulcan launches - Wikipedia

    en.wikipedia.org/wiki/List_of_Vulcan_launches

    Vulcan Centaur VC4L [13] Cape Canaveral, SLC‑41: SSC Demo-1 (Dream Chaser Tenacity) LEO NASA First flight of Dream Chaser. Maiden flight of the Vulcan Centaur VC4L configuration. Q3 2025 [18] Vulcan Centaur VC2S Vandenberg, SLC‑3E: SDA T1TR-B LEO: SDA: Tranche 1 Tracking Layer B missile tracking satellites. Q3 2025 [18] Vulcan Centaur VC2S

  5. United Launch Alliance - Wikipedia

    en.wikipedia.org/wiki/United_Launch_Alliance

    The Vulcan Centaur has a maximum liftoff thrust of 3,800,000 pounds-force (17,000 kN), enabling it to carry 56,000 pounds (25,000 kg) to low Earth orbit, 33,000 lb (15,000 kg) to a geostationary transfer orbit, and 16,000 lb (7,300 kg) to geostationary orbit. [35] The Vulcan first stage is the same size as the Delta family's Common Booster Core ...

  6. RL10 - Wikipedia

    en.wikipedia.org/wiki/RL10

    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.

  7. Vulcanoid - Wikipedia

    en.wikipedia.org/wiki/Vulcanoid

    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]

  8. List of spaceflight launches in July–December 2025 - Wikipedia

    en.wikipedia.org/wiki/List_of_spaceflight...

    GPS III-7, originally scheduled to launch on a ULA Vulcan rocket, was reassigned to the Falcon 9 following uncertainties in Vulcan's readiness. As a result, GPS III-10, originally planned to launch on the Falcon 9, will now launch on Vulcan. Q4 (TBD) [84] [85] Vulcan Centaur: Vandenberg SLC-3E: ULA: TBA: U.S. Space Force: TBA: Reconnaissance ...

  9. BE-4 - Wikipedia

    en.wikipedia.org/wiki/BE-4

    In September 2014 ULA selected BE-4 as the main engine for the Vulcan launch vehicle. Vulcan is a successor to the Atlas V, and BE-4 would replace the Russian-made RD-180 engine. [15] Blue Origin said that the "BE-4 would be 'ready for flight' by 2017". [7] Blue Origin indicated that they intend to make the engine available to companies beyond ...