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

History and specifics[edit | edit source]

A light year is about 9.5 quadrillion meters long.


Template image.
This article is a stub relating to science. You can help our database by expanding on it.

Appendices[edit | edit source]

References[edit | edit source]

External link[edit | edit source]

Community content is available under CC-BY-SA unless otherwise noted.