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    Home»Tech News»ESA’s Nuclear Rocket: Faster Mars Missions
    Tech News

    ESA’s Nuclear Rocket: Faster Mars Missions

    The Daily FuseBy The Daily FuseJune 14, 2025No Comments3 Mins Read
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    ESA’s Nuclear Rocket: Faster Mars Missions
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    This text originally appeared on Universe Today.

    Getting to Mars takes a extremely very long time, about 9 months utilizing at this time’s rocket technology. It is because common rocket engines burn gasoline and oxygen collectively (like a automotive engine), however they’re not very environment friendly. The elemental drawback is that spacecraft should carry each gasoline and oxidizer since there’s no air in area to help combustion. This creates a vicious circle: The extra gasoline you carry to go sooner, the heavier your spacecraft turns into, requiring much more gasoline to speed up that additional weight. To go sooner, you’d want large quantities of gasoline, making the rockets extremely costly and heavy. Present chemical propulsion methods are nearly at their theoretical limits, with little room for enchancment in effectivity.

    RELATED: Rockets for the Red Planet

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    While NASA funding has been slashed by the Trump administration with no allocation for nuclear thermal propulsion and/or nuclear electric propulsion, scientists on the European Space Agency (ESA) have been learning nuclear propulsion. Right here’s the way it works: As an alternative of burning gasoline with oxygen, a nuclear reactor heats up a propellant like hydrogen. The super-heated propellant then shoots out of the rocket nozzle, pushing the spacecraft ahead. This technique is far more environment friendly than chemical rockets.

    Revisiting Nuclear Rockets for Mars

    Nuclear rockets provide a number of key benefits, comparable to slicing Mars journey instances in half—from 9 months to about 4 to five months. The effectivity features come from the truth that nuclear reactors produce much more vitality per unit of gasoline than chemical reactions. Surprisingly, astronauts would really obtain much less dangerous radiation on shorter journeys, though the engine itself produces radiation. This occurs as a result of area vacationers are continuously bombarded by cosmic radiation throughout their journey, and slicing journey time in half considerably reduces their whole publicity. These engines work greatest for giant spacecraft that want to hurry up and decelerate dramatically, excellent for Moon and Mars missions the place speedy velocity adjustments of at the very least 25,000 km/h are required.

    The research, referred to as “Alumni,” prioritized security by cautious design. The nuclear reactor solely activates when the spacecraft is much from Earth in a protected orbit. Earlier than activation, the uranium gasoline has very low radioactivity and isn’t poisonous. A number of radiation shields defend the crew throughout the brief engine burns that final lower than 2 hours. The reactor is designed by no means to return to Earth’s ambiance. The analysis group spent over a 12 months analyzing this know-how and concluded it’s possible for long-term improvement. Nevertheless, there’s nonetheless vital work forward, together with laboratory testing of the brand new ceramic-metal reactor design, constructing protected testing services, and fixing technical challenges like gasoline sourcing and reactor restart methods.

    Nuclear thermal propulsion may revolutionize area journey, making missions to Mars and the Moon sooner and extra sensible. Whereas the know-how is promising and seems protected, it’s going to take a few years of improvement earlier than we see nuclear-powered spacecraft heading to the Pink Planet. It’s nice to see Europe demonstrating that it has the experience to develop this know-how, probably ushering in a brand new period of space exploration the place distant worlds turn into extra accessible than ever earlier than

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