Doomsday: 10 Ways the World Will End

There are twice as many rogue planets as stars in the galaxy. So what might happen if a ringed planet the size of Neptune were on a collision course with Earth? Within a period of just four hours, as people flee in panic, the gravity from the rogue planet would tear apart the Moon, stir up supersonic winds, trigger every earthquake fault and volcano, and finally pull the Earth to pieces.