Eli5: Why does light travel so fast?
In: 130
Fast? Given the size of the universe, light travels excruciatingly slow. The closest star to ours, Proxima Centauri, is over 4 light years away. Imagine if driving your car at top speed it took you four years to reach your nearest neighbor… Most stars within our galaxy are tens of thousands of light years away. The closest major galaxy to ours, the Andromeda Galaxy, is over two million light years away.
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