"Now let us return to the Earth," she said, pointing to the spot where our terrestrial Sun had disappeared. "But look again. You understand now that space is infinite; you will soon comprehend that time is eternal." We crossed other constellations and came back toward the solar system. I saw the Sun reappear, looking like a little star. "For an instant," said she, "I am going to give you, if not divine, at least angelic sight. Your soul shall feel the ethereal vibrations which constitute light itself, and shall know that the history of each world is eternal with God. To see is to know: behold!" Just as a microscope shows us an ant as large as an elephant, and penetrates the infinitely small, making the invisible visible, so at the Muse's command my sight suddenly acquired an unknown power of perception, and distinguished the Earth in space, very near the Sun, which was in eclipse, and from invisible it became visible. I recognized it; and as I watched, its disk grew larger, looking like the Moon a few days before the full. After a while I could distinguish the principal geographical aspects in the growing disk,--the snowy patch at the North Pole, the outlines of Europe and Asia, the North Sea, the Atlantic, the Mediterranean. The more steadily I fixed my gaze, the better I could see. Details became more and more perceptible, as if I were gradually changing the lenses of a microscope. I recognized the geographical form of France; but our beautiful country appeared to be entirely green,--from the Rhine to the Ocean, from the Channel to the Mediterranean, as if it were covered with one immense forest. I succeeded, however, better and better in distinguishing the slightest details, for the Alps, the Pyrenees, the Rhine, the Rhone, the Loire, were easily found. "Pay great attention," murmured my companion. As she said this, she placed the tips of her slender fingers lightly on my brow, as though she had wished to magnetize my brain and endow my perceptive faculties with still greater power. Then I looked again more intently at the vision, and saw before my eyes Gaul in the time of Julius Cæsar. It was during the war of independence aroused by the patriotism of Vercingetorix. "We are at such a distance from the Earth," said Urania, "that light requires all the time that separates us from Julius Cæsar to reach here. Only the rays of light that left the Earth at that time come to us; and yet light travels at the rate of three hundred thousand kilometres a second. It is fast, very fast, but it is not instantaneous. Astronomers on the Earth, who are observing stars situated as far from them as we are now, do not see them as they really are, but as they were when the rays of light which they see to-day left them; that is to say, as they were more than eighteen centuries ago. [Illustration]