Distance that light travel in 1 year (km)

Speed of light (km/s)

Total number of seconds in 1 year (Second)

$\begin{array}{l}{\text{Distance}}_{\text{Light}⇝\text{1}\text{year}}^{\text{Now}}\\ =9.460730472580800\times {10}^{12}\text{km}\end{array}$

$\begin{array}{l}{\text{Speedoflight}}_{\text{Old}}\\ =299792.458\text{km}/\text{s}\end{array}$

31,557,600 Sec