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Is it expected to deliver astronauts to the ISS Crew-Dragon-style, but without the 2nd stage; that is, "FSTO"? (as opposed to SSTO) Starship cannot get to orbit in any meaningful way without Super Heavy. Theoretically, it would be possible to get to LEO without any payload and by removing all recovery hardware, the body flaps, the landing legs, ...


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Is Starship planned to fly directly to the ISS without first stage? Is it expected to deliver astronauts to the ISS Crew-Dragon-style, but without the 2nd stage; that is, "FSTO"? No. Starship will be launched on top of Super Heavy. There is no plans for a SSTO Starship on Earth to carry crew/cargo to orbit. Is it even possible? Tweet. You would ...


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I just got this announcement from the JPL mail list ssd-announce@list.jpl.nasa.gov: During the week of April 12, the Horizons ephemeris system will be updated to replace the DE430/431 planetary ephemeris, used since 2013, with the new DE440/441 solution and sixteen most massive small-body perturbers. The new DE440/441 general-purpose planetary solution ...


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In Vallado's Fundamentals of Astrodynamics and Applications, Section 8.6.1: Gravity Field of a Central Body, he derives the equations to calculate perturbations due to aspherical bodies. In Section 8.7.1: Application: Simplified Acceleration Model, he walks through an example calculating the acceleration due to J2 through J6 (as well as from atmospheric drag)...


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A common limitation on CubeSats is that they can't contain explosives or high-energy substances, like rocket fuel. But there is a project testing the use of water for fuel. In orbit, the water is hydrolyzed into hydrogen and oxygen with electricity generated by solar panels. So the fuel is completely inert when it is loaded on the rocket and traveling with ...


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