The Astronomical Unit

Classical Mechanics Level 1

About how many miles is our sun away from planet Earth?

You may use the fact that

  • The speed of light is approximately \(3\times 10^8 \text{ metres/second} \), and

  • \(1\text{ mile} \) is equivalent to \(1.609 \text{ km} \).

  • It takes about 8 minutes for light from the sun to reach us.


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