A light-second is about 300,000 kilometers

Space Astronomy Basics

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A light-second is about 300,000 kilometers

Published By Shahzad Mahota @shahzad-mahota

A light-second is about 300,000 kilometers

Light in vacuum covers roughly 299,792 kilometers each second — usually rounded to 300,000 km. That distance is one light-second.

The Moon sits a bit over one light-second away; the Sun is about eight light-minutes. Deep-space delays are just stacks of those units.

Time becomes a ruler for emptiness. A light-second turns an abstract speed into a stretch of space you can almost feel.

Space Astronomy Basics Moon Solar System

Shahzad Mahota @shahzad-mahota

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A light-second is about 300,000 kilometers