- Imperial scientists often use the shorthand abbreviation HZ or Hz to indicate this term.
- Some also call it the green band.
In practice, this zone tends to be a few planets out from the main star of a system, in which the conditions for liquid water, temperate weather, and other necessary conditions for conventional life can arise.
- Too far out, and liquid water no longer exists, meaning that only cryomorphs, or extreme cold species can survive.
- Too far in, and only thermomorphs, or extreme heat-loving species can survive.
- And of course, there are hundreds of other factors also involved.
Orbital Location of the Habitable Zone
- However, in a hypothetical 12 orbit system, orbit 6.5 is considered an ideal HZ under the right conditions. Orbits 6 and 7 are also considered part of the life zone.
The idea of a Habitable Zone was independently developed by many different major and minor race sophont species.
- However, the one thing that most of these Charted Space species hold in common is that they are conventional carbon-based lifeforms. Their idea of habitability differs greatly from exotic or unconventional lifeforms such as Jovionoids.
- Marc Miller. Scouts (Game Designers Workshop, 1983), TBD.
- Joe Fugate. Grand Survey (Digest Group Publications, 1986), TBD.
- Joe Fugate, J. Andrew Keith, Gary L. Thomas. World Builder's Handbook (Digest Group Publications, 1989), TBD.
- Terrance McInnes, Dave Nilsen. World Tamer's Handbook (Game Designers Workshop, 1994), TBD.
- Jon F. Zeigler. First In (Steve Jackson Games, 1999), TBD.
- Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), TBD.
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science