Oct 31, 2009

This Orb's Solar System.

Well, i had decided that i wanted this Orb to be less hospitable than earth.  The simplest way to do that was to make it hotter or colder.  I decided to go with colder, since i could then mostly ignore those tricky parts of the texture map where it wraps around the pole and gets extremely distorted.

A yellow sun seemed somehow passé, so i tried some smaller stars on my Sun & Planet Creator Sheet.  It quickly became clear that this Orb's year was going to be significantly shorter.  I didn't want to bother with reckoning a year that was some weird fraction of an earth year, so i pushed the numbers around till this Orb's year was just over half an Earth year.

a screenshot of this Orb's system from StarGen with appropriate alterations.

Oct 18, 2009

Elusive Accuracy

Please note, that not all the sources i'll link to precisely agree.

  • Sometimes the calculations are only rough approximations of complex systems.
  • Sometimes scientists are making their best guesses, but aren't all making the same guess.
  • Sometimes it may be out of date information.
  • Sometimes i won't know which of the above is the case.
I'd like to know about any out-of-date info i've included, but i expect to find sources that don't exactly agree.

While i do strive for accuracy and understanding, it's also important not to get carried away with details that aren't important for one's purpose.

How to get Started

If you are interested in a normal fantasy world, you may not find anything useful in this post.  By "normal fantasy world," i mean one where the temperature, length of the year & the day are about the same as on Earth.  Often fantasy worlds have archaic or unique cosmologies, so that the nature of the sun, stars, moon, etc. are quite different from our own.  Somehow these cosmological differences seldom change the *effect* of the sun on the fictional world, but i suppose if you are re-writing the laws of physics, you can get any result you want.  I often find these fictional cosmologies quite interesting, but i won't digress further into these infinite possibilities.

Since i'm building a realistic sci-fi planet, & not assuming the sun & other features are just like earth’s, i need to find a good place to start.  A lot of the factors interrelated.  The only truly independent factor is the sun.  It will greatly effect your planet, but is not effected by it.

There’s a huge variety in the size of stars.  For “normal”, main sequence stars, the larger & brighter stars are bluer, while the smaller, dimmer stars tend to red. Wikipedia has a good overview of the star types.

Main sequence stars.  From Wikimedia.

Oct 16, 2009

Life, but Not as We Know it

When i mention "life", or more specifically "earth-like life", i will generally mean the same thing: carbon-based life-forms.  It’s something built from organic chemicals using mostly carbon, hydrogen,oxygen, & nitrogen, and requires access liquid water.  In other words: “life as we know it”.

While i don't deny that other biochemistries might exist— things that breath chlorine, ammonia, or even something that no one has thought of—  i will mostly ignore these possibilities.
  1. Firstly, because i’m not a chemist and can’t evaluate how plausible different proposed biochemistries are.
  2. I believe it’s all just a slightly educated guess.  Scientists know a lot about earth life, but not what makes something alive—certainly not to the degree needed to know what other forms life could or couldn't take.
  3. Finally, it would simply be too complicated to take into account all theoretically plausible types of life, and all the different types of planets they could live on.

digital sketch of a random gas-giant dwelling alien
digital sketch of a random gas-giant dwelling alien

Feel free to devise life based on any biochemistry you want, just realize that any statements about life and habitability in this blog won’t apply to "life not as we know it".

Oct 13, 2009

My Objectives for this Orb

For this project i will often follow the process & accept the outcome, weather expected or unexpected, but sometimes i'll fudge a little to get the results i want.  Since much of the process of even the most rigorous world-building is outrageous simplification, & bold guesstimation, there is a lot of wiggle room.  No doubt other world builders will choose to be loose where i will be strict, & consider factors that i don't understand or don't care about.  Though i am interested to hear about any mistakes i might make— especially before a lot of additional work is based on them.

This Orb is an out-of-the way planet in a sci-fi setting where some form(s) of FTL are possible.  Several waves of sapient explorers, refugees, conquers, & colonists have settled there.

The following are my objectives for this Orb.
  • While humans can live on it unaided, it is not as hospitable as Earth.
  • This Orb is not conducive to global communication and rule.
    • The oceans are completely separated by land, so it's impossible to sail round this Orb.
    • Mountains, rivers, currents & coast make it generally less convenient to cross a continent.
  • There is one location that is geographically destined to be the crossroads of the whole planet.
  • Some factors prevent the inhabitants from rebuilding a spacefaring civilization.

I'd recommend that aspiring world-builders jot down the traits that they want their new planet to have.  This will make it easier to navigate through the myriad possibilities in the following steps.

Oct 12, 2009

Hello World(s)

I've always been fascinated by maps, globes & planets.  As a child, i drew maps of all kinds.  Wanting to make better maps, i became curious about the "why"s behind real geography.  Gradually, i accumulated little bits of information from books & inferred patterns by looking at maps.  But i wasn't satisfied with what i understood.

A year or so ago, i searched the web for world-building, & though i had to dig, i found nearly all the answers i was looking for, including a step-by-step process for approximating climate. Using a more rigorous process, i designed a planet up from the orbital mechanics, until i got stalled in the middle of "climate".  My understanding had increased through following the process, & so i was no longer happy with how i started out.

So now i'm starting over. Via this blog, interested world-builders can watch the process unfold, or even better discover this after i've made a lot of progress.  I've found some good examples of constructed worlds, but not much that really shows the process of building that world.  I don't know how many people will be interested, but this blog is something that i would have loved to find.

I'll be linking to the best sources i've found, showing how i apply that information, & giving some ideas of my own.  I'll be trying to bring some of the technical information down to an easier-to-understand form.

Once i clear up the introductory matters, & finish tweaking the appearance & settings, we'll start with orbital mechanics.

an old version of this Orb taken with Celestia