Gravity was also working within the disk of rotating gas and dust pulling matter together to form primitive planets within the gas disk.Įventually the temperature and pressures in the central sphere became so high that the atoms began fusing together (nuclear fusion) and the Sun ignited producing heat and light and also the solar wind - an out streaming of subatomic particles. The result was that as the gravity intensified, the spin became faster resulting in a flat disk of gas and dust surrounding a central high density sphere of gas. As more and more matter fell toward the high density area, due to conservation of momentum it began to spin - rather like water going down a plug hole. As the matter clumped together, gravity in that area got stronger which attracted more matter which in turn increased the gravitational pull. The gas drifted in space and it's thought that another supernova explosion nearby may have caused a pressure wave to pass through the cloud that caused clumping to occur. The planets and the solar system were formed from a huge cloud of gases and dust particles left over when a massive star exploded as a supernova. The Planets of the Solar System Planet Formation Solar System Map - showing size, mass and orbital period, and orbit scale of planets & dwarf planets
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