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Observing that Servadac was completely absorbed in his own thoughts,
Lieutenant Procope had leisure to contemplate some of the present
perplexing problems, and to ponder over the true astronomical position.
The last of the three mysterious documents had represented that Gallia,
in conformity with Kepler's second law, had traveled along her orbit during
the month of March twenty millions of leagues less than she had done
in the previous month; yet, in the same time, her distance from the sun
had nevertheless been increased by thirty-two millions of leagues.
She was now, therefore, in the center of the zone of telescopic
planets that revolve between the orbits of Mars and Jupiter, and had
captured for herself a satellite which, according to the document,
was Nerina, one of the asteroids most recently identified.
If thus, then, it was within the power of the unknown writer
to estimate with such apparent certainty Gallia's exact position,
was it not likely that his mathematical calculations would enable him
to arrive at some definite conclusion as to the date at which she
would begin again to approach the sun? Nay, was it not to be expected
that he had already estimated, with sufficient approximation to truth,
what was to be the true length of the Gallian year?
So intently had they each separately been following their own train
of thought, that daylight reappeared almost before the travelers were
aware of it. On consulting their instruments, they found that they
must have traveled close upon a hundred leagues since they started,
and they resolved to slacken their speed. The sails were accordingly
taken in a little, and in spite of the intensity of the cold,
the explorers ventured out of their shelter, in order that they might
reconnoiter the plain, which was apparently as boundless as ever.
It was completely desert; not so much as a single point of rock
relieved the bare uniformity of its surface.
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