Difference between revisions of "Parsec"
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− | + | {{:Starship-Nav-Bar-Two-2019CE}} | |
− | A [[Parsec]] | + | A [[Parsec]] is a unit of length used to measure the distance between [[star]]s. |
* It is an [[Astrography|astrographic]] scale measurement. | * It is an [[Astrography|astrographic]] scale measurement. | ||
* It is a standard [[Third Imperium|Imperial]] [[metric]]. | * It is a standard [[Third Imperium|Imperial]] [[metric]]. | ||
+ | [[File: Technical Data.jpg|right]] | ||
+ | |||
+ | === Library Data Referral Tree === | ||
+ | Please refer to the following [[AAB]] [[Library Data]] for more information: <br> | ||
+ | '''[[Starship]]:''' | ||
+ | {{:Referral-Tree-Speed-of-Travel}} | ||
== Description ([[Specifications]]) == | == Description ([[Specifications]]) == | ||
− | The name ''parsec'' stands for "parallax of one second of arc", and allows calculating distances to nearby [[star]]s using simple observation and trigonometric parallax (apparent motion of an object due to change of position of the observer). It is one of the oldest [[Terra (world)|Terran]] methods for measuring the distances to [[star]]s. A parsec is based on a baseline of 1 [[Astronomical Unit]]. | + | The name ''parsec'' stands for "parallax of one second of arc", and allows calculating distances to nearby [[star]]s using simple observation and trigonometric parallax (apparent motion of an object due to change of position of the observer). It is one of the oldest [[Terra (world)|Terran]] methods for measuring the distances to [[star]]s. |
+ | * A parsec is based on a baseline of 1 [[Astronomical Unit]]. | ||
+ | * The standard imperial abbreviation is ''[[pc]]''. | ||
+ | |||
+ | === Image Repository === | ||
+ | [[File:Parsec Diagram.jpg]] | ||
+ | |||
+ | === Equivalent Metrics === | ||
+ | Other cultures have different values for a parsec: | ||
+ | * The [[Deshi]] is a [[Vilani]] equivalent to the parsec. | ||
− | The [[ | + | === Term Usage Example === |
+ | The [[Third Imperium|Imperial]] [[world]] of [[Regina (world)|Regina]] lies approximately one parsec from the [[non-aligned]] [[Ruie (world)|Ruie]] [[system]]. | ||
== History & Background ([[Dossier]]) == | == History & Background ([[Dossier]]) == | ||
The [[Solomani]] define one parsec to be the distance from [[Terra]] to a star that has a parallax of 1 arcsecond, and equals 3.261 [[light-year]]s or 206,265 [[Astronomical Unit]]s. | The [[Solomani]] define one parsec to be the distance from [[Terra]] to a star that has a parallax of 1 arcsecond, and equals 3.261 [[light-year]]s or 206,265 [[Astronomical Unit]]s. | ||
− | Modern [[Third Imperium|Imperial]] usage bases the parsec on the value of pi | + | Modern [[Third Imperium|Imperial]] usage bases the parsec on the value of pi times [[light-year]]s (one parsec is equal to 3.142 [[light-year]]s){{Unpublished cite|author= [[Marc Miller]], September 2018 }}. This is equivalent to a distance of 198,738 [[Astronomical Unit]]s, although for convenience and simplicity this value is generally rounded to 200,000 [[Astronomical Unit|AU]]. The concept was adopted following the [[Solomani Rim War]] to avoid the use of specifically Terranocentric [[metric]]s.{{Unpublished cite|author= [[Ade Stewart]] }} |
* By coincidence this distance is very close to the maximum distance a Jump-1 [[drive]] can jump. | * By coincidence this distance is very close to the maximum distance a Jump-1 [[drive]] can jump. | ||
* Because of this, 'parsec' has become the standard word used for this distance within the {{Imperium}}. | * Because of this, 'parsec' has become the standard word used for this distance within the {{Imperium}}. | ||
* Other races, using the orbital distance of their [[home world]] and different definitions of an arc second would derive different values for a parsec, but these wouldn't be [[Third Imperium|Imperial]] parsecs. | * Other races, using the orbital distance of their [[home world]] and different definitions of an arc second would derive different values for a parsec, but these wouldn't be [[Third Imperium|Imperial]] parsecs. | ||
− | + | == References & Contributors ([[Sources]]) == | |
− | |||
− | |||
− | == References & Contributors (Sources) == | ||
{{Metadata}} | {{Metadata}} | ||
{{Wikipedia|Parsec}} | {{Wikipedia|Parsec}} | ||
{{Advanced}} | {{Advanced}} | ||
{{Sources | {{Sources | ||
+ | |S1= {{Ludography cite|name= T5 Core Rules |page=615}} | ||
|S2= [[Traveller Wiki Editorial Team]] | |S2= [[Traveller Wiki Editorial Team]] | ||
|S3= Author & Contributor: [[User:WHULorigan|WHULorigan]] | |S3= Author & Contributor: [[User:WHULorigan|WHULorigan]] | ||
− | |S4= Author & Contributor: Lord (Marquis) and Master of Sophontology [[ | + | |S4= Author & Contributor: Lord (Marquis) and Master Scout Emeritus [[Adie Alegoric Stewart]] of the [[IISS]] |
+ | |S5= Author & Contributor: Lord (Marquis) and Master of Sophontology [[Maksim-Smelchak]] of the [[Ministry of Science]] | ||
}} | }} | ||
− | + | ||
− | |||
{{DE|Astrography|Metric|}} | {{DE|Astrography|Metric|}} | ||
{{LEN|Solomani}} | {{LEN|Solomani}} |
Latest revision as of 15:18, 5 October 2019
A Parsec is a unit of length used to measure the distance between stars.
- It is an astrographic scale measurement.
- It is a standard Imperial metric.
Library Data Referral Tree[edit]
Please refer to the following AAB Library Data for more information:
Starship:
- Speed of Travel
- Astronomical Unit (AU)
- FTL
- Light Speed (c)
- Light-week (lw)
- Light-year (ly)
- NAFAL (STL)
- Parsec (pc)
Description (Specifications)[edit]
The name parsec stands for "parallax of one second of arc", and allows calculating distances to nearby stars using simple observation and trigonometric parallax (apparent motion of an object due to change of position of the observer). It is one of the oldest Terran methods for measuring the distances to stars.
- A parsec is based on a baseline of 1 Astronomical Unit.
- The standard imperial abbreviation is pc.
Image Repository[edit]
Equivalent Metrics[edit]
Other cultures have different values for a parsec:
Term Usage Example[edit]
The Imperial world of Regina lies approximately one parsec from the non-aligned Ruie system.
History & Background (Dossier)[edit]
The Solomani define one parsec to be the distance from Terra to a star that has a parallax of 1 arcsecond, and equals 3.261 light-years or 206,265 Astronomical Units.
Modern Imperial usage bases the parsec on the value of pi times light-years (one parsec is equal to 3.142 light-years)[1]. This is equivalent to a distance of 198,738 Astronomical Units, although for convenience and simplicity this value is generally rounded to 200,000 AU. The concept was adopted following the Solomani Rim War to avoid the use of specifically Terranocentric metrics.[2]
- By coincidence this distance is very close to the maximum distance a Jump-1 drive can jump.
- Because of this, 'parsec' has become the standard word used for this distance within the Imperium.
- Other races, using the orbital distance of their home world and different definitions of an arc second would derive different values for a parsec, but these wouldn't be Imperial parsecs.
References & Contributors (Sources)[edit]
This article has metadata. |
This page uses content from Wikipedia. The original article was at Parsec. The list of authors can be seen in the page history. The text of Wikipedia is available under the Commons Attribution-ShareAlike 3.0 Unported License. |
- Marc Miller. T5 Core Rules (Far Future Enterprises, 2013), 615.
- Traveller Wiki Editorial Team
- Author & Contributor: WHULorigan
- Author & Contributor: Lord (Marquis) and Master Scout Emeritus Adie Alegoric Stewart of the IISS
- Author & Contributor: Lord (Marquis) and Master of Sophontology Maksim-Smelchak of the Ministry of Science
- ↑ Information provided to the library by Marc Miller, September 2018
- ↑ Information provided to the library by Ade Stewart