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A light year is the distance light travels in one year at 186,000 miles per second, and the nearest star (Proxima Centauri) is about four light years away.

factualpending

Speaker

Brian Cox

Evidence Quote

“the nearest star, the Proximus Centura... That's about four light years away... Light traveling 186,000 miles a second, four years to the nearest star [57:35]”

Source

Brian Cox: The quantum roots of reality | Full Interview— Big Think
Created: 8/11/2026, 5:29:48 AM

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