The light from the nearest star takes 4.3 years to reach us. Determine the distance to it if the speed of light is 300,000 km / s?

S = υ • t = 300000 km / s • 4.3 • 365 • 24 • 3600s = 40681440000000 km≈0.73747pc.
(1 pc = 206265 AU = 3 * 10 ^ 13 km).

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