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Updated: June 22, 2025
Selenographic charts have been constructed with a perfection which equals, if it does not even surpass, that of our terrestrial maps. Photography has given us proofs of the incomparable beauty of our satellite; all is known regarding the moon which mathematical science, astronomy, geology, and optics can learn about her.
An astronomical observatory; a selenographic museum, already open, though less than half completed. And of course it was against the law not to work for more than seventy-two consecutive hours. And over the whole setup there seemed to hang the question: Can Man really live in space, or does his invasion of it signal his final downfall?
He had a thin intellectual face, dark eyes, trap mouth, white hair, soft speech that was almost shy. "I'm Xavier Rodan," he said. "I search out my own employees. I do minerals survey for gypsum, bauxite anything. And site survey, for factories and other future developments. I also have connections with the Selenographic Institute of the University of Chicago.
Here may be placed an important remark on the subject of the map which they used for their observations. In the selenographic maps, where, on account of the reversal of objects by the telescope, the south is at the top and the north at the bottom, it seems natural that the east should be on the left and the west on the right. However, it is not so.
Half an hour after being sighted, this luminous point had disappeared behind the dark horizon; but the verification of this phenomenon was of considerable consequence in their selenographic studies.
But it is far from being an ascertained fact, that we experience increased heat during the apparition of solar spots; the inverse phenomenon is more probably true. Herschel occupied himself also with the physical constitution of the moon. In 1780, he sought to measure the height of our satellite's mountains. More recent selenographic studies differ from this conclusion.
"The moon has been much studied," resumed Barbicane; "its mass, density, weight, volume, constitution, movements, distance, the part it plays in the solar world, are all perfectly determined; selenographic maps have been drawn with a perfection that equals, if it does not surpass, those of terrestrial maps; photography has given to our satellite proofs of incomparable beauty in a word, all that the sciences of mathematics, astronomy, geology, and optics can teach is known about the moon; but until now no direct communication with it has ever been established."
This topographical map, one yard high and divided into four parts, is a masterpiece of lunar chartography. After these savants may be cited the selenographic reliefs of the German astronomer Julius Schmidt, the topographical works of Father Secchi, the magnificent sheets of the English amateur, Waren de la Rue, and lastly a map on orthographical projection of Messrs.
Its nature therefore they had no opportunity of ascertaining. It began to disappear behind the dark horizon within less than half an hour after the time that M'Nicholl had signalled it. Still, the fact of the uncontested existence of such a phenomenon was a grand one, and of considerable importance in selenographic investigations.
Therefore there is water and air upon the moon, as little as you like, but the fact can no longer be contested." No, it could not be, and if ever Barbicane saw the earth again his notes would testify to this fact, important in selenographic observations.
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