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
Sun and Moon (Middle-earth) and 'died': the Sun after this for a while left its course, burning a large part of Arda the world (apparently creating the deserts of Far Harad). In writings which are older than the material from which the published "Silmarillion" was drawn, the Moon was described at one point as being created by Morgoth as a mockery of Arda the world, but this notion was abandoned. In the Round World version of the legendarium, the Sun and the Moon were not the fruit of the Two Trees, but actually preceded the creation of the Trees. Instead, the Trees preserved the