every few hundred years most planets line up on the same side of the sun. calcute the total force on the Earth due to Venus, Jupiter, and Saturn, assuming all four planets are in a line. the masses are Mv= .815 Me, Mj=318 Me, Ms= 95.1 Me, and their mean distances from the sun are 108,150,778 and 1430 million kn, respectively. what fraction of the sun's force on the Earth is this?