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ArcticGlacier40 t1_iybn5hg wrote

Reply to comment by Apprehensive-Tour-33 in Japan successfully uses steam to propel Moon spacecraft | Japan’s space agency Jaxa has announced it successfully used steam to propel its spacecraft that was launched as one of the payloads aboard Nasa’s Orion spacecraft. by yourSAS

It's currently expensive. So is renewable energy.

That doesn't mean we should put it aside and forget about it.

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