System Density

Sophonts have been exploring the stars for millennia.

• Astronomy is the name of the science of studying the stars.
  • Astrography is the science of mapping the stars.

The System Densities table describes the density of Star Systems in the different areas of known space.

Stellar System Density Table

Stellar Density Table (…by mainworlds AKA world-systems)

IISS T5SS Protocols (v.1720.21c / pg. 421)

ZT	Zone Type (ZT)	Designation	%	Subsector Range	Sector Average	Sector Range	Remarks
AV	Absolute Void	Empty	0%	0 worlds	0 worlds	0 worlds	Absolutely empty of significant planetary objects.
EG	Extra-Galactic	Very Sparse	1-2%	1 world	6 worlds	1 to 37 worlds	Rogue planets and other galactic ejecta. The stars are so few in this zone and it is nigh impossible for low capability FTL engines to traverse Extra-Galactic Space. Extra-Galactic Space is practically impossible for lower technology civilizations to traverse.
IntG	Rift	Sparse	3-6%	2 to 5 worlds	38 worlds	38 to 215 worlds	Rifts are the mostly empty places within a galaxy structure. The stars are very few in this zone and it is almost impossible for low capability FTL engines to make their way around. Rifts are significant barriers to interstellar travel for lower technology civilizations.
IntG	Spare	Very Low	7-32%	6 to 25 worlds	216 worlds	216 to 419 worlds	Spare zones begin to form aggregate planetary masses. The stars are very spare in this zone and it is very difficult for low capability FTL engines to make their way around.
IntG	Scattered	Low	33-49%	26 to 39 worlds	420 worlds	420 to 639 worlds	Scattered zones contain significant planets and have significant potential for conventional life. The stars are scattered in this zone and it is difficult for low capability FTL engines to make their way around.
IntG	Standard	Average	50-65%	40 to 52 worlds	640 worlds	640 to 839 worlds	Standard zones contain a goodly number of planets and have good potential for conventional life. The stars are moderately dense in this zone and it is a little challenging for low capability FTL engines to make their way around.
IntG	Dense	High	66-82%	53 to 65 worlds	840 worlds	840 to 1,059 worlds	Dense zones contain a lot of planets and have very good potential for conventional life. The stars are dense in this zone and it not difficult for low capability FTL engines to make their way around.
IntG	Cluster	Very High	83-90%	66 to 72 worlds	1,060 worlds	1,060 to 1,169 worlds	Cluster zones contain many planets and have great potential for conventional life. The stars are very dense in this zone and it is easy for low capability FTL engines to make their way around.
IntG	Core	Dense	91-100%	73 to 80 worlds	1,170 worlds	1,170 to 1,280 worlds	Core zones contain many, many planets, but the density and radiation make conventional life very difficult. The stars are so dense in this zone that even the least capable FTL engines can easily make their way around.
IntG	Full	Very Dense	100%	80 worlds	1,280 worlds	1,280 worlds	The maximum number of star systems possible within the specified area.

• IntG = Intragalactic Space.

References and contributors

This list of sources was used by the Traveller Wiki Editorial Team and individual contributors to compose this article. Copyrighted material is used under license from Mongoose Publishing or by permission of the author. The page history lists all of the contributions.

• Author & Contributor: User:77topaz
• Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science