NASA scientist Philip Lubin is working on perfecting laser technology that could propel a light spacecraft to Mars in as little as three days.

In order for spacecraft to achieve faster speeds, Lubin proposes using an electromagnetic propulsion system that would use light and radiation rather than the current fuel-based rocket propulsion system.

Photonic propulsion is a theoretical system that would use the energy and momentum from photons to move objects through space. According to Wired, when photons from a laser array reflect off an object, their energy is translated into a push that’s capable of moving objects like spacecraft.

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