Mars Nuclear Thermal Rocket, by Nick Stevens – International Association of Astronomical Artists

1987 Nuclear Mars Mission, using Energia

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Ripon Magazine Summer 2017 by Ripon College - Issuu

Realistic Designs R-Z - Atomic Rockets

Realistic Designs H-M - Atomic Rockets

Bad News: Interstellar Travel May Remain in Science Fiction - Universe Today

Mars - Wikipedia

Seal of Approval - Atomic Rockets

Astronomy Magazine – sciencesprings

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