Medium August 25, 2026 • 11:17

Nuclear Spacecraft - Medium

By Avi Loeb

The most efficient use of rocket fuel is by tailoring the exhaust speed to be exactly equal and opposite in direction to the velocity of…

An illustration of NASAs SR-1 Freedom nuclear spaceship in front of Mars. (Image credit: NEMES LASZLO/SCIENCE PHOTO LIBRARY/Getty Images/NASA)
The most efficient use of rocket fuel is by tailoring t… [+6743 chars]

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Nuclear Spacecraft - Medium

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