Inaccessible and wonderfully extended over this soil covered with picturesque projections! Indeed, nature had not left the bottom of this crater flat and empty. It possessed its own peculiar orography, a mountainous system, making it a world in itself. The travellers could distinguish clearly cones, central hills, remarkable positions of the soil, naturally placed to receive the chefs-d'œuvre of Selenite architecture. There was marked out the place for a temple, here the ground of a forum, on this spot the plan of a palace, in another the plateau for a citadel; the whole overlooked by a central mountain of 1500 feet. A vast circle, in which ancient Rome could have been held in its entirety ten times over.
"Ah!" exclaimed Michel Ardan, enthusiastic at the sight; "what a grand town might be constructed within that ring of mountains! A quiet city, a peaceful refuge, beyond all human misery. How calm and isolated those misanthropes, those haters of humanity might live there, and all who have a distaste for social life!"
"All! It would be too small for them," replied Barbicane simply.
CHAPTER XVIII.
GRAVE QUESTIONS.
But the projectile had passed the enceinte of Tycho, and Barbicane and his two companions watched with scrupulous attention the brilliant rays which the celebrated mountain shed so curiously all over the horizon.
What was this radiant glory? What geological phenomenon had designed these ardent beams? This question occupied Barbicane's mind.
Under his eyes ran in all directions luminous furrows, raised at the edges and concave in the centre, some twelve miles, others thirty miles broad. These brilliant trains extended in some places to within 600 miles of Tycho, and seemed to cover, particularly towards the east, the northeast and the north, the half of the southern hemisphere. One of these jets extended as far as the circle of Neander, situated on the 40th meridian. Another by a slight curve furrowed the Sea of Nectar, breaking against the chain of Pyrenees, after a circuit of 800 miles. Others, towards the west, covered the Sea of Clouds and the Sea of Humours with a luminous network. What was the origin of these sparkling rays, which shone on the plains as well as on the reliefs, at whatever height they might be? All started from a common centre, the crater of Tycho. They sprang from him. Herschel attributed their brilliancy to currents of lava congealed by the cold; an opinion, however, which has not been generally adopted. Other astronomers have seen in these inexplicable rays a kind of moraines, rows of erratic blocks, which had been thrown up at the period of Tycho's formation.
"And why not?" asked Nicholl of Barbicane, who was relating and rejecting these different opinions.
"Because the regularity of these luminous lines, and the violence necessary to carry volcanic matter to such distances, is inexplicable."