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) an immense island of fire. The Moon was described as an immense island of crystal. It was also said there that the youth Tilion, who guided the Moon, was said to secretly be in love with Arien, the maiden who guided the Sun, and that because he steered the Moon too close to the Sun the Moon was burned, causing the darker spots on the Moon (the Lunar maria). Aulë devised "vírin", a crystalline material from which he made a cup wherein the flower was set. The markings on the moon are caused as Lórien tried to pluck the "Rose