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						 Search for Vulcanoid Asteriods  - Page 2
						 
						
							
							Planet Vulcan
							 
							 
							
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								Le Verrier proposed planet Vulcan (mid 19th century)
								
 
								
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									Previously had "mathematically discovered" - Neptune
									
 
									
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										Based on Uranus deviating from its expected orbit
										
 
									 
									 
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									Showed the ellipse of Mercury's orbit was processing
									
 
									 
									 
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									Suggested an inner planet might explain Mercury's orbit
									
 
									
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										Einstein's theory of general relativity (1916) explained it years later
										
 
									 
									 
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									Named the inner planet: Vulcan
									
 
								 
							 
						 
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