Titlebook: Humans in Space; 21st Century Frontie Harry L. Shipman Book 1989 Harry L. Shipman 1989 21st century.humans.research.space

冷峻

神秘

PHIL

金丝雀

Getting around the Inner Solar System takes less rocket fuel to send an automated spacecraft to the surface of Mars than to the surface of the moon. In this sense, Mars is “closer” to the earth than the moon is, though in terms of distance Mars is well over ten times as far away even when it makes its closest approach to the earth.

粉笔

Space Industrializationle to tell whether such industrial activities will be profitable, it’s also hard to predict whether people will be needed. Even so, a few sensible comments can be made about which destinations in the solar system seem to make the most sense.

GUILE

The Necessities of Lifeditioned so that the only clothing which is needed is that required to preserve the customary human decency, and so the traditional need for clothing and shelter is transformed into the need to create and maintain a space environment which is suitably cool.

Ascendancy

斑驳

天真

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陈列

https://doi.org/10.1007/978-1-4899-6104-421st century; humans; research; space