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 the castle east of the sun and west of the moon. East of the Sun and West of the Moon "East of the Sun and West of the Moon" () is a Norwegian fairy tale. "East of the Sun and West of the Moon" was collected by Peter Christen Asbjørnsen and Jørgen Moe. It is Aarne–Thompson type 425A, the search for the lost husband; other tales of this type include "Black Bull of Norroway", "The King of Love", "The Brown Bear of Norway", "The Daughter of the Skies", "The Enchanted Pig", "The Tale of the Hoodie", "Master Semolina", "The Sprig