our sun) MKS UNITS : G=6.674.10-11 , r = 1 , 392 ×10 6 ×10 3 m,  M= 1,9891 ×10 30 kg r   Equatorial radius 6.955 × 10 5  km , Mean distance from Earth 1.496 × 10 8  km , sun's g on the distance of earth =GM/r 2