Question

express the distance from earth to sun in parsec and light year

Answer 1

$$\begin{gathered} \mathbf{Distance}\mathbf{}\mathbf{from}\mathbf{}\mathbf{earth}\mathbf{}\mathbf{to}\mathbf{}\mathbf{sun}\mathbf{:} \\ \mathrm{d}=149600000\mathrm{km} \\ \mathbf{Express}\mathbf{}\mathbf{in}\mathbf{}\mathbf{parsec}\mathbf{:} \\ 1\mathrm{parsec}=3.09\times {10}^{13}\mathrm{km} \\ \mathrm{So}, \\ \mathrm{d}=\frac{149600000}{3.09\times {10}^{13}}\mathrm{parsec} \\ \mathbf{=}\mathbf{4}\mathbf{.}\mathbf{84}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{6}}\mathbf{}\mathbf{parsec} \\ \mathbf{Express}\mathbf{}\mathbf{in}\mathbf{}\mathbf{light}\mathbf{}\mathbf{years}\mathbf{:} \\ 1\mathrm{light}\mathrm{year}==9.46\times {10}^{12}\mathrm{km} \\ \mathrm{So}, \\ \mathrm{d}=\frac{149600000}{9.46\times {10}^{12}}\mathrm{lightyears} \\ \mathbf{}\mathbf{}\mathbf{=}\mathbf{1}\mathbf{.}\mathbf{58}\mathbf{\times }{\mathbf{10}}^{\mathbf{-}\mathbf{5}}\mathbf{}\mathbf{}\mathbf{lightyears} \end{gathered}$$