Light-year
A Light-year or lightyear (symbol: ly) is a unit of measurement of length, specifically the distance light travels in vacuum in one year.
- It is an astrographic scale measurement.
- It is a standard Imperial metric.
Description (Specifications)
One (Solomani) light-year is equal to:
- about 9,460,730,472,580 meters
- about 63,240 astronomical units
- about 0.3066 parsecs
Following the Solomani Rim War, the Imperium began to move away from Terranocentric metrics, instead adopting a set of universal scales and measures not specifically based on the physical parameters of the Prime system of an enemy state.
One (Imperial) light-year is equal to:
- about 9,454,449,092,018 meters (pre-SRW) / about 9,521,904,469,482,150 meters (new calculation[1])
- about 63,200 astronomical units (pre-SRW) / about 63,650 astronomical units (new calculation[2])
- about 0.3064 parsecs (pre-SRW) / about 0.3183 parsecs (new calculation[3])
History & Background (Dossier)
The exact length of the light-year depends on the length of the reference year used in the calculation.
- Within the Imperium, an Imperial standard year of 365.00 Imperial standard days is used.
- The light-year is often used to measure distances between stars.
- The preferred unit of measurement for such distances is the parsec.
References & Contributors (Sources)
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.
- Marc Miller. Imperial Encyclopedia (Game Designers Workshop, 1987), TBD.
- Frank Chadwick, Dave Nilsen. Fire, Fusion, & Steel (Game Designers Workshop, 1994), 5.
- David Golden, Guy Garnett. Fire, Fusion & Steel (Imperium Games, 1997), 7.
- Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), 615.
- Traveller Wiki Editorial Team
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science