Difference between revisions of "Parsec"

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[[Image:Parsec.jpg|right]]
 
[[Image:Parsec.jpg|right]]
A '''Parsec''' (symbol: pc) is a unit of length, used to measure the distance between stars.  
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A [[Parsec]] (symbol: [[pc]]) is a unit of length, used to measure the distance between [[star]]s.
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* It is an [[Astrography|astrographic]] scale measurement.
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* It is a standard [[Third Imperium|Imperial]] [[metric]].
  
== Description (Specifications) ==
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== Description ([[Specifications]]) ==
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]].
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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]].
  
== History & Background (Dossier) ==
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The [[Deshi]] is a [[Vilani]] equivalent.
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 units.  
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* By coincidence this distance is very close to the maximum distance a jump-1 drive can jump.  
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== History & Background ([[Dossier]]) ==
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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.
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Modern [[Third Imperium|Imperial]] usage bases the parsec on the value of pi (3.142) times [[light-year]]s or 198,738 [[Astronomical Unit]]s,{{Unpublished cite|author= [[Marc Miller]], September 2018 }} a concept adopted following the [[Solomani Rim War]] to avoid the use of specifically Terranocentric [[metric]]s.{{Unpublished cite|author= [[Ade Stewart]] }} For convenience and simplicity this value is generally rounded to 200,000 [[Astronomical Unit|AU]].  
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* 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 Imperial parsecs.
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* 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}}
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{{Advanced}}
 
{{Sources
 
{{Sources
|S1= Author & Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]]
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|S2= [[Traveller Wiki Editorial Team]]
|S2=
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|S3= Author & Contributor: [[User:WHULorigan|WHULorigan]]
|S3=
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|S4= Author & Contributor: Lord (Marquis) and Master of Sophontology [[User:Maksim-Smelchak|Maksim-Smelchak]] of the [[Ministry of Science]]  
|S4=
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}}
 
}}
  
  
  
{{DE|P|Astrography|Unit of measurement}}
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{{DE|Astrography|Metric|}}
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{{LEN|Solomani}}

Latest revision as of 09:42, 13 February 2019

Parsec.jpg

A Parsec (symbol: pc) is a unit of length, used to measure the distance between stars.

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 Deshi is a Vilani equivalent.

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 (3.142) times light-years or 198,738 Astronomical Units,[1] a concept adopted following the Solomani Rim War to avoid the use of specifically Terranocentric metrics.[2] For convenience and simplicity this value is generally rounded to 200,000 AU.

  • 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
Smallwikipedialogo.png 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.

This article was copied or excerpted from the following copyrighted sources and used under license from Far Future Enterprises or by permission of the author.

  1. An unpublished factoid written by Marc Miller, September 2018
  2. An unpublished factoid written by Ade Stewart