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starship-design: Shielding info
About a month ago we discussed shielding properties.
Here I found a little bit of info about that subject:
(My guess is that some may have seen it before)
<http://science.nas.nasa.gov/Services/Education/
SpaceSettlement/75SummerStudy/Table_of_Contents1.html>
Space Settlements: A Design Study
Chapter 2 - Physical Properties of Space
Matter in Space: A Major Resource
Chapter 4 - Choosing Among Alternatives
Shielding
For passive shielding they suggest about 4.5 tonnes per square meter
Timothy