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A Journey in Other Worlds

(7) Inclination of axis.
Planets (1) (2) (3) (4) (5) (6) (7)
Mercury. ........ ......... 1.24 7.17 0.85 13.7 .....
Venus... 23 21 22 ........ 0.92 5.21 0.83 13.4 53+
The Earth. ..... Spring, 93 1.00 5.67 1.00 16.09 23 1/2
Summer, 93
Terrestrial days Autumn, 90
Winter,89
Mars... 24 37 23 Spring, 191 0.96 2.54 0.38 6.2 27 1/2
Summer, 181
Martian days Autumn, 149
Winter, 147
Asteroids........................................................
Jupiter. 9 55 28 ......... 0.22 1.29 2.55 40.98 1 1/2
Saturn..10 29 17 ......... 0.13 0.63 1.15 18.53 27
Uranus. ....... ......... 0.18 1.41 0.91 14.6 102(?)
Neptune......... ......... 0.20 0 0.88 14.2 .....
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"You see," Ayrault explained, "on Jupiter we shall need our apergetic outfits to enable us
to make long marches, while on Saturn they will not be necessary, the increase in our
weight as a result of that planet's size being considerably less than the usual load carried
by the Roman soldier."
"I do not imagine," said Cortlandt, "we should long be troubled by gravitation without
our apergetic outfits even on Jupiter, for, though our weight will be more than doubled,
we can take off one quarter of the whole by remaining near the equator, their rapid
rotation having apparently been given providentially to all the large planets. Nature will
adapt herself to this change, as to all others, very readily. Although the reclamation of the
vast areas of the North American Arctic Archipelago, Alaska, Siberia, and Antarctic
Wilkes Land, from the death-grip of the ice in which they have been held will relieve the
pressure of population for another century, at the end of that time it will surely be felt
again; it is therefore a consolation to feel that the mighty planets Jupiter and Saturn,
which we are coming to look upon as our heritage, will not crush the life out of any
human beings by their own weight that may alight upon them."
Before going to bed that evening they decided to be up early the next day, to study
Jupiter, which was already a brilliant object.
The following morning, on awakening, they went at once to their observatory, and found
that Jupiter's disk was plainly visible to the naked eye, and before night it seemed as large
as the full moon.
They then prepared to check the Callisto's headlong speed, which Jupiter's attraction was
beginning to increase. When about two million miles from the great planet, which was
considerably on their left, they espied Callisto ahead and slightly on their right, as
Deepwaters had calculated it would be. Applying a mild repulsion to this--which was
itself quite a world, with its diameter of over three thousand miles, though evidently as
cold and dead as the earth's old moon--they retarded their forward rush, knowing that the
resulting motion towards Jupiter would be helped by the giant's pull. Wishing to be in
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