What is another word for light second?
Pronunciation: [lˈa͡ɪt sˈɛkənd] (IPA) 
A 'light second' is a measure of distance that is equal to the distance light travels in one second, which is approximately 299,792,458 meters, or about 186,282 miles. Synonyms for this term include 'light distance', 'light-time', 'speed of light distance', and 'light-second interval'. In astronomy and astrophysics, these terms are commonly used to describe the distance between celestial objects. For example, the distance between Earth and the Moon is about 1.28 light-seconds. Similarly, the distance between Earth and the Sun is about 499 light-seconds. These synonyms help simplify and clarify communication in the scientific community, especially for those studying and analyzing space and celestial objects.
