Planets orbiting a sun invariably line up into an orbital plane, looking a bit, if one were to speed up the process, like a flying saucer. Why would this be so, and is there a relationship to the shape that solar systems take and the familiar shape of our ships? There is indeed a relationship, as what is termed the flying saucer is shaped to simulate the gravity dynamics of a solar system so that it can become its own little solar system when instigating its own gravity field. A flying saucer in motion can turn sideways or upside down, and the passengers are unaffected. They are, gravity-wise, in their own little world. Solar systems do not take this shape by accident, though there is no comparable effect on Earth for man to study and point to. Gaseous planets, such as Saturn, have rings in a plane, but nothing orbiting the Earth, man-made or otherwise, is so affected.
The planets are lined up in a plane not because of anything inherent in themselves, but because of a drama that is taking place in their sun. All suns, being hot and therefore liquid or vaporous in the main, rotate, and do so for the same reasons that the Earth rotates - parts of the core are seeking to escape this or that side of the Universe, and due to the motion of rotation that this escape attempt initiates, these same parts find themselves back where they started from, not having any brakes as it were in a liquid or vaporous environment. The Sun's influence on its planets is more than light, more than the solar wind in all its components, more than the magnetic field it generates which reaches out beyond the planets. The Sun's rotation reflects the influences on it, those parts of the Universe that exert a gravitational pull or a magnetic clash, or if there are other large bodies close enough, a repulsion force.
A sun's rotation does not just happen, it begins due to attraction or repulsion. This is what begins the motion. A sun's rotation reflects this, and whatever rotation institutes within the sun has a dominant effect on the planets that are about the sun. Why do the planets not orbit in all directions? Logically, if there were no enforcement, it would be chance, yet it seems instead to be the rule. A sun's rotation indicates where the dominant forces are on the sun, and these dominant forces effect more than the sun. They rule the planets too, pulling and pushing on them, as well. But beyond these outside influences, the rotation of a sun has an effect on her planets, as the streams within her core, being uneven in their composition, pull and push on the planets as they may be susceptible to these forces. Thus, coalescing planets may not start out all in a line, but as they are pushed and pulled they tend to move as far or as near as they can get, and in the end, are in a line with the sun's moving parts, as this is where far and near lie.