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Light year: Misc

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Dr Who

Up to date as of January 31, 2010
(Redirected to Light-year article)

From TARDIS Index File, the free Doctor Who reference.

A light-year is a unit of measurement used to measure interstellar distance. It is quantified as the distance that light travels in a vacuum over the course of an Earth year.

While it is a measurement of distance, not time, terms for lengths of multiple years can be used to indicate larger values; for example, ten light years could be called a light-decade, one hundred light years could be called a light-century, and so on. Conversely, shorter periods can be used, such as a light-months, light days, and so on; Earth's distance from its sun could be expressed as 8 light-minutes.

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This article uses material from the "Light-year" article on the Dr Who wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

Memory-beta

Up to date as of February 02, 2010
(Redirected to Light-year article)

Memory Beta, the wiki for licensed Star Trek content.

A light-year is a unit of distance measurement based on the travel of light energy, undisturbed in a vacuum, over the course of on Earth year.


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This article uses material from the "Light-year" article on the Memory-beta wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

ST Expanded

Up to date as of February 07, 2010

The Star Trek Expanded Universe Database is for fanon and related content. See Memory-Alpha.org for the canon Star Trek wiki.

One light year is the distance that light travels in one Earth year. It is equal to 9.4605284 x 1015 meters or 5.878499811103157 x 1012 miles. Light years are units of measurement critical to starship navigation.

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This article uses material from the "Light year" article on the ST Expanded wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

Starwars

Up to date as of February 04, 2010

From Wookieepedia, the Star Wars wiki.

A light year, also light-year, abbreviated ly, is the distance light travels in one year.

Since the Galactic Standard Calendar used a year of 368 days, the length of a Galactic Standard Light Year would have been 9,531,961,160,601,600 meters.

Behind the scenes

This assumes that the the "Galactic Standard" Day, Hour, etc. and Meter are equal to Earth's. The Galactic light year was 0.75% longer than an Earth based light year.

It is also possible that Galactic days (and hours etc.) were 0.75% shorter than there Earth equivalents, and that the light years are the same length. (see below)

The exact length of a light year depends on the exact length used for one “year”. On Earth The IAU uses a Julian year of 365.25 days, while other sources may use a Gregorian year of 365.2425 days, or another year altogether.

Source year (days) light year (kilometer) light year (miles)
IAU 365.25 9,460,730,472,580,800 5,878,625,373,184
Gregorian 365.2425 9,460,536,207,068,020 5,878,504,662,190
Google 365.242199 9.460 528 4 ×1015 5.878 499 81 ×1012
Yahoo 365.2411 9.460 5 ×1015 5,878,482,164,161
Coruscant 368 9,531,961,160,601,600 5,922,886,070,723

Note that while Yahoo separately reports a year length of 365.24220 days, its rounding of the light year length to five digits, works out to a year length of ~365.2411 days.

Appearances

I find your lack of sources disturbing.

This article needs to be provided with more sources and/or appearances to conform to a higher standard of article quality.

  • Star Wars 7: New Planets, New Perils (First appearance)
  • Death Star

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This article uses material from the "Light year" article on the Starwars wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.

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