The Earth is approximately $150$ gigametres away from the Sun. Express $150$ gigametres in kilom

Question

The Earth is approximately $150$ gigametres away from the Sun. Express $150$ gigametres in kilometres, giving your answer in standard form Light take $3\frac{1}{3}$ nanoseconds to travel $1$ metre. Calculate the time light takes to travel from the Sun to the Earth, giving your answer in seconds, in standard form.

Accepted Answer

(i) $1.5\times10^8\text{ km}$. (ii) $5\times10^2\text{ s}$.

Standard Form in Astronomy

Standard Form in Astronomy

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