Rolls-Royce and UK Space Agency work together to develop nuclear-powered spacecraft engines that can take us to Mars in just three months
- The companies will explore the potential of nuclear power as an energy source
- A nuclear-powered spacecraft engine could halve travel times to Mars
- They can also reduce the dose of radiation used by astronauts
The British aircraft manufacturer Rolls-Royce has formed an unlikely alliance with the UK Space Agency to develop nuclear-powered spacecraft engines.
The two organizations will work together to explore the potential of nuclear power as a source of energy for future expeditions into deep space.
If successful, a nuclear spacecraft could shorten its journey to Mars to just three to four months – about half the time possible by using current chemical engines.
What’s more, the shortened travel times would mean that astronauts aboard the spacecraft would be exposed to less radiation during the flight, which would make future trips to Mars or other planets safer.

If successful, a nuclear-powered spacecraft engine time could shorten the travel time to Mars to just three to four months – about half the possible time using current systems
Nuclear propulsion was previously described by NASA as a ‘game-changing technology for deep space exploration’.
It involves channeling the energy release by splitting the atom to accelerate high-speed propellants.
Rolls-Royce and the UK Space Agency predict that this type of engine could be twice as efficient as the chemical engines currently used to propel rockets, halving travel times.
Dr Graham Turnock, chief executive of the UK Space Agency, said: ‘Space nuclear power and propulsion is a game-changing concept that could unlock future deep-space missions that will take us to Mars and beyond.
“This study will help us understand the exciting potential of atomic-powered spacecraft and whether this emerging technology can help us travel through space faster than ever before.”
A nuclear-powered engine can also make space travel safer for astronauts.
With half a travel time, astronauts would be exposed to a lower dose of radiation, which could protect them from radiation sickness and cancer.

Rolls-Royce and the UK Space Agency predict that this type of engine could be twice as efficient as the chemical engines currently used to propel rockets, halving travel times.
“Space radiation can put astronauts at significant risk for radiation sickness and increased lifelong risk for cancer, central nervous system effects and degenerative diseases,” NASA explained.
Dave Gordon, UK Senior Vice President Rolls-Royce Defense, said: ‘We are excited to be working with the UK Space Agency on this groundbreaking project to define future space nuclear technologies.
‘We believe there is a true UK niche capability in this area, and this initiative can build on the strong UK core network and supply chain.
“We look forward to developing these and other exciting space projects in the future as we continue to develop the power to protect our planet, secure our world, and explore our universe.”
The idea of a nuclear-powered spacecraft engine is not new.
NASA launched a program in 1961 to develop an engine-powered engine, although the program was discontinued in 1972 due to cuts in the space budget.
Now, more than 45 years later, NASA is once again working on an NTP (Nuclear Thermal Propulsion) system.
“We are working on a first-generation NTP system with great growth potential,” said Doyce ‘Sonny’ Mitchell, manager of the NTP project at NASA’s Marshall Space Flight Center in Huntsville.
Nasa’s timeline for the project remains unclear.