Stability of the Solar System one point, the two may fall into sync, at which time Jupiter's constant gravitational tugs could accumulate and pull Mercury off course with 1–2% probability, 3–4 billion years into the future. This could eject it from the Solar System altogether or send it on a collision course with Venus, the Sun, or Earth. Another example is Earth's axial tilt which, due to friction raised within Earth's mantle by tidal interactions with the Moon (see below), will be rendered chaotic at some point between 1.5 and 4.5 billion years from now. Objects coming from outside the solar system can also affect
East of the Sun and West of the Moon some candles, and tells her to light them at night, to see what is sharing her bed. The youngest daughter obeys, and finds he is a highly attractive prince, but she spills three drops of the melted tallow on him, waking him. He tells her that if she held out a year, he would have been free, but now he must go to his wicked stepmother, who enchanted him into this shape and lives in a castle east of the sun and west of the moon, and marry her hideous daughter, a troll princess. In the morning, the youngest daughter