Solar System's Future Could Be Bumpy

Study calculates the odds that two planets collide or one crashes into sun in the next 5 billion years... For the new study, the researchers started with the best known information about the position and orbital velocity of each of the 10 bodies, and marched simulations forward in nine-day steps for the next 5 billion years, the projected life of the sun... Mercury collides with Venus about 1.76 billion years from now...