The Transit of Venus: Its Meaning and Use (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from The Transit of Venus: Its Meaning and Use

First of all, let me explain what the transit of Venus is. It is, in fact, the passing of the planet between the Earth and the Sun in such a way as that it will be actually seen from the Earth travelling across the Sun's face. Were Venus nearer the Earth, so as to appear as large as the Moon, the planet being in fact nearly three times as large in diameter as the Moon is, her transit across the Sun would cause an eclipse of the Sun. Being very much more distant from us, however, than the Moon is, and consequently appear ing very much smaller, the eclipse' is reduced to a transit,' and, instead of covering the face of the Sun, the planet appears during the transit like a small round black spot. We all know that an eclipse of the Sun is caused by the Moon passing between the Sun and the Earth, they being all three in a line. In like manner, to cause a transit, the Sun, the planet.

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