Difference between revisions of "Planet X"
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| − | Before complicated astronomical devices were perfected, the true number of | + | Before complicated [[Astronomy|astronomical]] devices were perfected, the true number of [[planet]]s was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered. |
[[Category:Terms]] | [[Category:Terms]] | ||
Latest revision as of 23:29, March 30, 2009
Before complicated astronomical devices were perfected, the true number of planets was unknown. Planet X was referred to as a planet in the Solar System that had not yet been discovered.