Interplanetary travel might be about to get a whole lot faster — and hotter. UK startup Pulsar Fusion today unveiled “Sunbird,” a nuclear fusion-powered rocket concept that could halve the time it takes to travel across our solar system — and, maybe, beyond it. Machine learning models show the rocket could potentially propel a spacecraft with a mass of about 1,000kg (2,200lb) to Pluto in four years — less than half the time it took NASA’s New Horizons mission, which was powered by regular ion thrusters. Earth to Mars? Four months. Earth to Saturn? Two years. Rather than launch from…
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