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"Science fiction is what scientists would do if they could - if they had enough grant money, enough time, and enough brains to do the wonderful things they would like to do."
- Greg Bear
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| Free Return Trajectory | ||
| The idea that it would be possible for a projectile to go around the Moon and then return to Earth. |
It was the intent of the Baltimore Gun Club to actually hit the Moon with a projectile. However, upon missing the Moon the passengers began to debate upon the course of the projectile.
| In watching the course of the projectile they could see that on
leaving the moon it followed a course analogous to that traced
in approaching her. It was describing a very long ellipse,
which would most likely extend to the point of equal attraction,
where the influences of the earth and its satellite are neutralized.
Such was the conclusion which Barbicane very justly drew from facts already observed, a conviction which his two friends shared with him. "And when arrived at this dead point, what will become of us?" asked Michel Ardan. "We don't know," replied Barbicane. "But one can draw some hypotheses, I suppose?" "Two," answered Barbicane; "either the projectile's speed will be insufficient, and it will remain forever immovable on this line of double attraction----" "I prefer the other hypothesis, whatever it may be," interrupted Michel. "Or," continued Barbicane, "its speed will be sufficient, and it will continue its elliptical course, to gravitate forever around the orb of night." |
| Technovelgy from From the Earth to the Moon,
by Jules Verne. Published by Pierre-Jules Hetzel in 1867 Additional resources -
|
In writing the story the way he did, Verne became the first person to describe the idea of a free return trajectory, that is, a path that would lead from the Earth, around the Moon, and back to Earth again without any additional fuel expended for navigation.
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'...there's a narrow belt where the climate is moderate.'
'He wore spectacles with thick wavy lenses. The spectacles were intended to make him not only half blind, but to give him whanging headaches besides.'
'... with the Master-operator all you have to do is push one! A remarkable achievement!'
'Not like me. A T-1000, advanced prototype. A mimetic poly-alloy. Liquid metal.'
'It was riddled with holes that were the mouths of tunnels.'
'The massive feet working the pedals, arms and hands flashing and glinting...'
