Latest By
Category:


Armor
Artificial Intelligence
Biology
Clothing
Communication
Computers
Culture
Data Storage
Displays
Engineering
Entertainment
Food
Input Devices
Lifestyle
Living Space
Manufacturing
Material
Media
Medical
Miscellaneous
Robotics
Security
Space Tech
Spacecraft
Surveillance
Transportation
Travel
Vehicle
Virtual Person
Warfare
Weapon
Work

"The science fiction method is dissection and reconstruction. You look at the world around you, and take it apart into its components. Then you take some of those components, throw them away, and plug in different ones, start it up and see what happens."
- Frederik Pohl

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."

From From the Earth to the Moon, by Jules Verne.
Published by Various 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.

Comment/Join this discussion ( 2 ) | RSS/XML | Blog This |

Additional resources:
  More Ideas and Technology from From the Earth to the Moon
  More Ideas and Technology by Jules Verne
  Tech news articles related to From the Earth to the Moon
  Tech news articles related to works by Jules Verne

Articles related to Space Tech
Testing New Spacesuits In 1929 And 2015
Space Station Kitchens 1929 and 2015
Bigelow Gets FAA Backing For Moon
Will We Mine The Moon For Ice?

Want to Contribute an Item? It's easy:
Get the name of the item, a quote, the book's name and the author's name, and Add it here.

<Previous
Next>

Google
  Web TechNovelgy.com   

 

 

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

More News

Autonomous Cars Will Own Themselves
'The robot drew his cab up before Eric's modest six-room bungalow.'

World's First 3D Printed Villa
'It makes drawings in the air following drawings...'

Brainflight Brain-Controlled Drone
'Mr Gant, you must think in Russian. Can you do that?'

Students Control Lab Experiments Remotely Via App
'Hello, Europa... Is this your robot I'm looking at, in sector 94?'

ROBEAR Nursing Care Robot
What other robots are strong enough to carry you? Do you want them to do so?

Testing New Spacesuits In 1929 And 2015
'I'm going to pump the air from this room... so that the interior will be like airless and pressure-less space.'

Space Station Kitchens 1929 and 2015
'Plates and cups ... slowly floated down to the floor and were not broken.'

Volvo's 'Drive Me' Program Offers Autonomous Cars In 2017
'She woke just before the signal from the car which would have called her...'

Squad X Core Technologies For Infantry
'You can flip through your several types of radar displays quicker than you can change channels to avoid a commercial...'

More SF in the News

More Beyond Technovelgy

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.