Below is a list of external tools.
Disclaimer: Galactic Crucibles is unaffiliated with any of the sites linked below.
Planet building tools[]
- Visual planet creator - http://planetquest.jpl.nasa.gov/system/interactable/1/index.html
- Stellar class table - http://www.world-builders.org/lessons/less/les1/StarTables.html
- Habitable zone, ideal distance, insolation, period calculator - http://web.archive.org/web/20110712052917/http://www.bumply.com/astro.html
- World generator programme that makes nice maps - http://donjon.bin.sh/scifi/world/
- Star lifetime calculator - http://hyperphysics.phy-astr.gsu.edu/hbase/astro/startime.html
- Alternative planetary classification system - http://arcbuilder.home.bresnan.net/PCLMaster.html
- Some orbital mechanics calculators - http://orbitsimulator.com/formulas/
- Luminosity calculator - http://web.archive.org/web/20030218125318/www.geocities.com/Area51/Corridor/8611/mseqstar.htm
Biology[]
- Evolution basics - http://animals.about.com/od/evolution/ss/evolution.htm
- Plants under alien suns - http://www.solstation.com/life/a-plants.htm
- Creating a Scientificially Plausible Alien - http://gizmodo.com/5784971/how-to-create-a-scientifically-plausible-alien-life-form
Videos[]
National Geographic's Extraterrestrial[]
Link: http://www.youtube.com/watch?v=CNeTxPgGJ7I
Two alien worlds around a red dwarf star and a gas giant moon hypothesized by scientists.
Alien Planet[]
Link: http://www.youtube.com/watch?v=BNLfNe12BKE
A docufiction based on the fictional desert planet created by Wayne Barlowe. It details the adventures of interstellar probes and their encounters with the native life forms.
Miscellaneous[]
- SI units and prefixes - http://en.wikipedia.org/wiki/International_System_of_Units#Units_and_prefixes
- Site that analyzes various aspects of science fiction for plausibility - http://hardsf.org/