in it in a gaseous state. About it at great distances circle not only our earth, but certain kindred bodies called the planets. These shine in the sky because they reflect the light of the sun; they are near enough for us to note their movements quite easily. Night by night their positions change with regard to the fixed stars. It is well to understand how empty is space. If, as we have said, the sun were a ball nine feet across, our earth would, in proportion, be the size of a one-inch ball, and. at a distance of 323 yards ...
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in it in a gaseous state. About it at great distances circle not only our earth, but certain kindred bodies called the planets. These shine in the sky because they reflect the light of the sun; they are near enough for us to note their movements quite easily. Night by night their positions change with regard to the fixed stars. It is well to understand how empty is space. If, as we have said, the sun were a ball nine feet across, our earth would, in proportion, be the size of a one-inch ball, and. at a distance of 323 yards from the sun. The moon would be a speck the size of a small pea, thirty inches from the earth. Nearer to the sun than the earth would be two other very similar specks, the planets Mercury and Venus, at a distance of 125 and 250 yards respectively. Beyond the earth would come the planets Mars, Jupiter, Saturn, Uranus, and Neptune, at distances of 500, 1,680, 3,000, 6,000, and 9,500 yards respectively. There would also be a certain number of very much smaller specks, flying about amon
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