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A '''light-year''' was a unit of measurement used to measure interstellar distance. It ess quantified as the distance that light travelled in a vacuum over the course of an [[Earth]] year.
A '''light-year''' was a unit of measurement used to measure interstellar distance. It was quantified as the distance that light travelled in a [[vacuum]] over the course of an [[Earth]] year. They could be further measured as '''light-centuries'''. ([[DW]]: ''[[The Ribos Operation]]'')


While it was a measurement of distance, not time, terms for lengths of multiple years could be used to indicate greater distances. For example, ten light years might be called a light-decade, one hundred light years could be called a light-century, and so on. Conversely, shorter periods could be used, such as a light-months, light days, and so on; Earth's distance from [[Sol|its sun]] could be expressed as eight light-minutes.
==Known Distances==
*The [[Ao]] [[constellation]] and [[Qqaba]] was 9.6 light-years from [[Gallifrey]]. ([[NA]]: ''[[Lungbarrow]]'')
*[[Vega 3]] was 27 light-years from [[Earth]]. ([[AK9]]: ''[[K9 and the Beasts of Vega]]'')
*[[Aldebaran II]] was 65 light-years from [[Earth]]. ([[BBCR]]: ''[[The Paradise of Death]]'')
*[[Sunday]] was 100 light-years from [[Earth]]. ([[NSA]]: ''[[Wetworld]]'')
*[[Beta Caprisis]] was 100 light-years from [[Earth]]. ([[NA]]: ''[[Sanctuary]]'')
*[[Ribos]] was 300 light-years from the [[Magellanic Clouds]]. ([[DW]]: ''[[The Ribos Operation]]'')
*[[Bellatrix]] was 324 light years away from [[Earth]]. ([[NA]]: ''[[Nightshade (novel)|Nightshade]]'')
*[[gger]] was 500 light-years from [[Earth]]. ([[DWA]]: ''[[Listen - The Stars]]'')
*[[Crimson Heart]] was 10,000 light-years from [[Earth]]. ([[SJA]]: ''[[Death of the Doctor]]'')
*The [[Orpheus constellation]] was 10,000 light-years from [[Earth]]. ([[K9TV]]: ''[[Aeolian (TV story)|Aeolian]]'')
*[[Gallifrey]] was 30,000 light years from [[Earth]]. ([[PDA]]: ''[[The Devil Goblins from Neptune]]'')
*[[Gorgos]] was 100,000,000 light-years from [[Earth]]. ([[SJA]]: ''[[Eye of the Gorgon]]'')
*The [[Second Doctor]] once dematerialised [[The Doctor's TARDIS|the TARDIS]] 4 quadrillion light-years from the nearest [[galaxy]]. ([[DWA]]: ''[[When Starlight Grows Cold]]'')
 
==Known Measurements==
*The [[Mutter's Spiral]] [[galaxy]] was around 100,000 light-years in diameter. ([[NSA]]: ''[[The Eyeless]]'')
*The [[Morestran]] empire spanned 80,000,000 light-years. ([[PDA]]: ''[[Zeta Major (novel)|Zeta Major]]'')


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Revision as of 20:44, 6 September 2011

A light-year was a unit of measurement used to measure interstellar distance. It was quantified as the distance that light travelled in a vacuum over the course of an Earth year. They could be further measured as light-centuries. (DW: The Ribos Operation)

Known Distances

Known Measurements

Light-year