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Relativistic rocket means any spacecraft that travels close enough to light speed for relativistic effects to become significant. The meaning of "significant" is a matter of context, but often a threshold velocity of 30% to 50% of the speed of light (0.3 c to 0.5 c ) is used.
Sounding rocket 2 Suborbital Retired (0/1) 2018 [36] Astra Rocket 3 Light rocket 2 LEO Retired (2/5) 2020 [37] [38] Astra Rocket 4 Light rocket 2 LEO Development 2023 (planned) [39] [40] SALVO Light rocket 2 LEO Cancelled — [41] [42] [43] Bellatrix Aerospace: Chetak Light rocket 2 LEO Development 2023 (planned) Blue Origin: New Shepard ...
An antimatter rocket is a proposed class of rockets that use antimatter as their power source. There are several designs that attempt to accomplish this goal. The advantage to this class of rocket is that a large fraction of the rest mass of a matter/antimatter mixture may be converted to energy, allowing antimatter rockets to have a far higher energy density and specific impulse than any ...
As Rocket Lab argues, other companies' proposals will probably cost between $5.8 billion and $7.7 billion, and won't be ready to go until at least 2035, maybe as long as 2039.
A photon rocket is a rocket that uses thrust from the momentum of emitted photons (radiation pressure by emission) for its propulsion. [1] Photon rockets have been discussed as a propulsion system that could make interstellar flight possible during a human lifetime, which requires the ability to propel spacecraft to speeds at least 10% of the speed of light, v ≈ 0.1c = 30,000 km/s. [2]
iRocket (Innovative Rocket Technologies Inc) is a startup based in New York, founded in 2018, which develops rocket engines and a small reusable launch vehicle named Shockwave. [ 1 ] [ 2 ] In 2021 iRocket signed a Space Act Agreement With NASA's Marshall Space Flight Center to accelerate the development of its reusable rocket engine.
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All launch vehicle propulsion systems employed to date have been chemical rockets falling into one of three main categories: Solid-propellant rockets or solid-fuel rockets have a motor that uses solid propellants, typically a mix of powdered fuel and oxidizer held together by a polymer binder and molded into the shape of a hollow cylinder. The ...