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Why do the solar system's planets have different compositions?
This runaway growth led to the formation of the gas and ice giants in the outer solar system. This first-order model of planetary growth in the ... Christie Jilly Research Scientist and Lab Manager, ...
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Changing ideas about the Solar System
An Egyptian astronomer called Ptolemy (AD100-168) described one of the earliest ideas for how the Solar System is structured. Ptolemy’s model and many earlier ideas of the Solar System had the ...