NASA Develops First Nuclear Propulsion Spacecraft for Mars Mission Planned in 2028

NASA plans to launch the Space Reactor-1 (SR1) Freedom spacecraft with nuclear propulsion towards Mars in 2028. This mission aims to advance interplanetary travel using a nuclear fission reactor to power an ionic engine, marking a significant milestone in over 60 years of nuclear propulsion research. The SR1 Freedom will utilize a 20-kilowatt reactor to generate electricity, enabling efficient long-distance space travel. Safety protocols will be in place to handle nuclear materials during the mission.

Published Mar 30, 2026

NASA is developing the Space Reactor-1 (SR1) Freedom, the first nuclear propulsion spacecraft, with a launch aimed for 2028 to Mars. The spacecraft will feature a nuclear fission reactor to power an ionic engine, enhancing mass transport efficiency in deep space.

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This mission builds on over 60 years of nuclear propulsion attempts, utilizing a 20-kilowatt reactor and replacing solar panels with thermal radiators. Safety measures for handling nuclear materials will be implemented, and the project follows previous nuclear power missions, highlighting a renewed interest in nuclear energy for regular interplanetary missions.