Friday, November 2, 2012

Astronomical unit


1 AU(Astronomical unit) = 149596436542 M
AU is nothing but distance between center point of sun and center point of earth.
This is calculated by the help of speed of light. Sun light takes 8 min 19 sec to reach earth. Speed of light is 299792458 m/s. so 8 min 19 sec is 499 sec. 499 s * 299792458 m/s=149596436542 M (1 AU).

No comments:

Post a Comment