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  2. Bell's spaceship paradox - Wikipedia

    en.wikipedia.org/wiki/Bell's_spaceship_paradox

    This means, by definition, that with respect to S the distance between the two rockets does not change even when they speed up to relativistic velocities." [1] Then this setup is repeated again, but this time the back of the first rocket is connected with the front of the second rocket by a silk thread. They concluded:

  3. Relativistic rocket - Wikipedia

    en.wikipedia.org/wiki/Relativistic_rocket

    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.

  4. Terran R - Wikipedia

    en.wikipedia.org/wiki/Terran_R

    On 12 April 2023, after the first flight of the Terran 1, Relativity Space CEO Tim Ellis announced that the rocket was no longer going to be further developed and focus would move to Terran R. [6] The new version of the rocket will have a maximum payload capacity of 23,500 kg (51,800 lb) to low earth orbit (LEO) with a fully reusable first stage, and 33,500 kg (73,900 lb) to LEO if fully expended.

  5. Field propulsion - Wikipedia

    en.wikipedia.org/wiki/Field_propulsion

    In the general relativistic field propulsion system space is considered to be an elastic field similar to rubber which means that space itself can be treated as an infinite elastic body. If the space-time curves, a normal inwards surface stress is generated which serves as a pressure field.

  6. Non-relativistic spacetime - Wikipedia

    en.wikipedia.org/wiki/Non-relativistic_spacetime

    The classic example of a non-relativistic spacetime is the spacetime of Galileo and Newton. It is the spacetime of everyday "common sense". [1] Galilean/Newtonian spacetime assumes that space is Euclidean (i.e. "flat"), and that time has a constant rate of passage that is independent of the state of motion of an observer, or indeed of anything external.

  7. Cosmological perturbation theory - Wikipedia

    en.wikipedia.org/wiki/Cosmological_perturbation...

    The approach is non-local and coordinate dependent but gauge invariant as the resulting linear framework is built from a specified family of background hyper-surfaces which are linked by gauge preserving mappings to foliate the space-time. Although intuitive this approach does not deal well with the nonlinearities natural to general relativity.

  8. Antimatter rocket - Wikipedia

    en.wikipedia.org/wiki/Antimatter_rocket

    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 ...

  9. Hans Bethe - Wikipedia

    en.wikipedia.org/wiki/Hans_Bethe

    Hans Albrecht Bethe (/ ˈ b ɛ θ ə /; German: [ˈhans ˈbeːtə] ⓘ; July 2, 1906 – March 6, 2005) was a German-American physicist who made major contributions to nuclear physics, astrophysics, quantum electrodynamics and solid-state physics, and received the Nobel Prize in Physics in 1967 for his work on the theory of stellar nucleosynthesis.