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Calculations for Science Fiction Writers

Circular Orbits

v2

William Haloupek



Copyright 2013 William Haloupek

Smashwords Edition, License Notes

This ebook is licensed for your personal enjoyment only. This ebook may not be re-sold or given away to other people. If you would like to share this book with another person, please purchase an additional copy for each recipient. If you’re reading this book and did not purchase it, or it was not purchased for your use only, then please return to Smashwords.com and purchase your own copy. Thank you for respecting the hard work of this author.

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This is one of a planned series called Calculations for Science Fiction Writers. Other chapters will include space travel with constant acceleration, relativistic and nonrelativistic cases, elliptical orbits, rotational dynamics, and more. For those writers who want to get the details right!



Suppose you’re writing a science fiction story, involving a satellite in Earth orbit. For purposes of the plot, you want the satellite to have an orbital period of one hour. Surely, some of your readers are going to point out such an orbit is impossible – it would have to have a radius less than the radius of the Earth!

As another example, suppose your story involves a space station, rotating on its axis, like the one in the movie 2001: A Space Odyssey. You want to give your readers some idea of what it’s like to live on this space station, including its size, and the effective gravity felt by passengers. Of course, those things are related to the rate of spin, which is also an important aspect of life onboard. Given the radius and the acceleration, what is the period of spin? Is it 1 second, or 100? It makes a big difference! If you just guess, some of your readers will catch you.

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