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** ScienceMarchesOn: It's a case of not thinking of it, because the basic physics remained unchanged. But it appears to never have occurred to Heinlein that Jupiter could be used to boost a spacecraft to reach a further target faster and with less fuel required. (This book ends with the Stones heading for Saturn.)
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** ScienceMarchesOn: It's a case of not thinking of it, because the basic physics remained unchanged. But it appears to never have occurred to Heinlein that Jupiter could be used to boost a spacecraft to reach a further target faster and with less fuel required. (This book ends with the Stones heading for Saturn.)) Assuming, of course, that Jupiter is in the right area to be usefully placed...
