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Units & Conversionshard
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A standard light-second is the distance light travels in one second (c≈299,792,458 m/sc \approx 299,792,458 \text{ m/s}c≈299,792,458 m/s). If an astronomical source is 1.51.51.5 parsecs away, how many light-seconds is this? (1 parsec≈3.086×1016 m1 \text{ parsec} \approx 3.086 \times 10^{16} \text{ m}1 parsec≈3.086×1016 m)