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News Link • Space Travel and Exploration

Water-Powered Spaceship Could Make Mars Trip on the Cheap

• Space

The space coach concept vehicle is water-driven and water-centric, starting with its solar-powered electrothermal engines. These engines would super-heat water, and the resulting steam would then be vented out of a nozzle, producing the necessary amount of thrust.

Electrothermal engines are very efficient, and they're well-suited for sustained, low-thrust travel,  ....
The space coach's living quarters would be composed of a series of interconnected habitat modules. These would be expandable and made of fabric, researchers said — much like Bigelow Aerospace's inflatable modules, which have already been deployed and tested in low-Earth orbit.

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