Propulsion in space

Conceptual illustration of a diffractive solar sail.

Hidden physics complicates the dream of launching sailing spacecraft to other stars

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A new theoretical study points to another problem with interstellar light sails: As they approach relativistic speeds, the Doppler effect and the deflection of light reduce the efficiency of the thrust. In one of the weakest contributions of light, even
This artist rendering shows the briefcase-sized probe Lunar Flashlight using its near-infrared lasers to illuminate dark polar regions on the moon and search for water ice. Credit: Credit: NASA/JPL-Caltech

Is NASA's lunar satellite in danger? Problems with the propulsion system of the Lunar Fleshlight spacecraft

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Mission Control is characterizing its new "green" propulsion system and developing an updated plan for Lunar Fleshlight's journey to the Moon
Hall type electric motor. Source: NASA.

Electric propulsion for space

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Artist's impression of VASIMR engines in action. Image source - Wikimedia Commons

to Mars in thirty-nine days

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