As navigator, Lovell took with him a sextant to take star readings - in case the computers failed and they had to find their own way home.
[4] M. Sambridge, J. Braunl & H. McQueen: “Geophysical parametrization and interpolation of irregular data using natural neighbours” (1995). ↑，推荐阅读搜狗输入法2026获取更多信息
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