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toopok4k3
on May 25, 2022
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DARPA moving forward with nuclear thermal engine d...
Funny that you mention this, Ion thrusters do exist. They are a thing but with very limited uses cases. They still need a kind of propellant gas like Xenon or Krypton that gets used.
https://en.wikipedia.org/wiki/Ion_thruster
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Search:
https://en.wikipedia.org/wiki/Ion_thruster