Question

How to calculate distance between stars and planet and from our earth

Answer 1

calculate using light year

Distance = speed  x time                 (speed of light = 3x108m/s)  

= 3x 108 m/s  x  365x 24 x 60 x 60 s  = 9.46 x 1012 km

Answer 2

3*108m/s*365*24*60*60s=9.46*1012 km