|   | 
				
					
	
		  | 
	 
	
		| Paper: | 
		Recent Developments in Gravitational Microlensing | 
	 
	
		| Volume: | 
		403, The Variable Universe: A Celebration of Bohdan Paczynski | 
	 
	
		| Page: | 
		86 | 
	 
	
		| Authors: | 
		Gould, A. | 
	 
	
	
		| Abstract: | 
		Twenty-one years after Bohdan’s seminal paper launched the field of gravitational microlensing, it has radically diversified from a method narrowly focused on finding dark matter to a very general astronomical tool. Microlensing has now detected 12 planets, including several that are inaccessible by other search methods. It has resolved the surfaces of distant stars, served as a magnifying glass to take spectra of extremely faint objects, and revealed a number of surprising phenomena. I take a sweeping look at this remarkable technique, giving equal weight to its successes and to the tensions that are continuing to propel it forward. | 
	 
	
		| 
			
			
		 | 
	 
	
		  | 
	 
 
					 
				 | 
				  |