“On the contrary, we are closer to it than ever. If the sun, which is
thirty-eight millions of leagues from us, were to go around the earth
every day, do you know how far it would have to go in a minute? More
than 100,000 leagues. But this incomprehensible speed is nothing. The
stars, as I have just told you, are so many suns, comparable to ours in
volume and brilliancy; only they are much farther away, and that is what
makes them appear so small. The nearest is about thirty thousand times
as distant as the sun. Accordingly, in order to go around the earth in
twenty-four hours, as it appears to do, it would have to move at the
rate of thirty thousand times 100,000 leagues a minute. And how would it
be with other stars a hundred times, a thousand times, a million times
farther away—stars which, despite their distance, would all have to
accomplish their journey around the earth always in exactly twenty-four
hours? And remember, furthermore, the prodigious size of the sun. You
want it, the giant, the colossus, beside which the earth is only a lump
of clay, to circle at an impossible speed in infinite space, in order to
give light and heat to our planet; you want thousands and thousands of
other suns, quite as large and immensely farther off—in a word, the
stars—to accomplish also, with velocities increasing according to the
distance, a daily journey around this humble terrestrial globe! No! no!
such an arrangement is contrary to reason; to allow it is to want to
make the firebrands, the hearth, the whole house, turn around a little
bird on a spit.”
“Then it is the earth that turns, and we turn with it,” Claire again
interposed. “In consequence of this movement the sun and stars seem to
us to move in the opposite direction, like trees and houses when we are
on the train. Since the sun seems to go around the earth from east to
west in twenty-four hours, it is a proof that the earth turns on its
axis from west to east in twenty-four hours.”
“The earth turns in front of the sun in a manner to present its
different parts successively to the rays of that body; it pirouettes on
its axis like a top. Moreover, while it thus rotates in twenty-four
hours, it revolves around the sun in the interval of a year. In playing
with a top you find a good example of two analogous movements executed
together. When the top turns on its point, not moving from the same
place—in short, when it sleeps—it has only the movement of rotation. But
in throwing it in a certain way, you know better than I that it circles
on the ground while turning on its point. In that instance, it
represents in a small way the double movement of the earth. Its rotation
on its point represents the whirling motion of the earth on its axis;
its course on the ground represents the earth’s revolution around the
sun.
Public-domain text, read in full here on John Shaqi.
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