# Light minute/Related Articles

From Citizendium, the Citizens' Compendium

*See also changes related to Light minute, or pages that link to Light minute or to this page or whose text contains "Light minute".*

## Parent topics

- Speed of light [r]: A physical constant
*c*describing the speed of electromagnetic radiation in vacuum. In the International System of Units the metre is the distance light travels in classical vacuum in 1/*c*seconds, using the defined value*c = c*≡ 299 792 458 m/s (exact)._{0}^{[e]}

- Light year [r]: Distance that light travels in vacuum in one year; 9,460,730,472,580.800 km = 9.4607304 * 10
^{12}km.^{[e]} - Light month [r]: The distance, meters, that light travels in one month.
^{[e]} - Light week [r]: Distance that light travels in a vacuum in one week; 1 light week = 1.81314469 * 10
^{11}km.^{[e]} - Light day [r]: Distance that light travels in a vacuum in one day; 1 light day = 25,902,068,371,200 m = 2.5902067 * 10
^{13}m.^{[e]} - Light hour [r]: Distance that the light travels in vacuum in one hour, 1.0792528 * 10
^{12}m^{[e]} - Light second [r]: Distance that light travels in vacuum in one second; 2.99792458 * 10
^{8}m.^{[e]}