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Sphere +1 (or of the Sky)

The Conquest of Circumterrestrial Space

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The Mystery of the Seven Spheres
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Abstract

We have heard how on 31 May 1953 Edmund Hillary, standing on the summit of Everest, the last unexplored point of Sphere 0, said: “Above us, the sky”.

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Correspondence to Giovanni F. Bignami .

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Bignami, G.F. (2015). Sphere +1 (or of the Sky). In: The Mystery of the Seven Spheres. Springer, Cham. https://doi.org/10.1007/978-3-319-17004-6_5

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