Question

How far is the Sun from the Earth?

Answer 1

Light Years

1. A light-year is a unit used to measure astronomical distance.
2. One light-year is defined as the total distance traveled by light in one year.
3. One light-year is equal to $9.461\times {10}^{15}m$

Distance between sun and earth

Speed of light $=300,000km/s$

Time taken for light to reach earth from the sun $=500s\left(8.3min\right)$

Number of seconds in a year $=31,557,600s$

Therefore, distance in light-years $=\frac{500}{31,557,600}=1.6\times {10}^{-5}$ light-years

Hence the distance between the Earth and the Sun is $1.6\times {10}^{-5}$ light-years.