They're twins, and
Siamese twins at that!" He drew a figure on his knee, thus:
[Illustration: two circles touching each other]
"Just imagine the earth and Venus of the same size, and so near to
one another that their combined gravity has brought them together!
That's Capellette! And the contact is the place where they touch!"
They considered this in wondering silence for a while. Then the
doctor continued:
"It's just as we had deduced; each of the planets is larger than the
earth. I saw the figures in that geography.
"But astronomically they are one. They revolve around Capella
together; the rotate about a common center daily, just as the earth
rotates on its axis. This common center is, of course, in the
contact."
"Are both globes inhabited?" Billie was greatly interested.
"Yes. All parts of both planets are developed to the same extent,
and evenly settled. They are just one great nation, with a common
language. This, of course, is traceable to the great density of the
air, enabling the people to fly wherever they wanted to go.
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