The solar system used to be a cloud of gas and dust and then a super nova occurred. The waves that came from the explosion compressed the gas and dust. This caused a solar nebula and the cloud started to spin, gradually getting faster. Throughout this process particles started to stick together and eventually formed the planets and moons. Also, the center got so hot that it became a star and we had our sun.
"Solar System Formation." Windows to the Universe. N.p., n.d. Web. 14 Feb. 2011.
<http://www.windows2universe.org/our_solar_system/formation.html>.
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