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Old March 16th 18, 08:14 AM posted to sci.astro.amateur
RichA[_6_]
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Default Increasing exposure to space radiation means manned-flight = onlyProject Orion will work

It's the only craft that can life enough weight to provide shielding for astronauts.

https://phys.org/news/2018-03-space-...hazardous.html