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		| Paper: | 
		Chandra X-Ray Observatory - First Year Science Highlights | 
	 
	
		| Volume: | 
		238, Astronomical Data Analysis Software and Systems X | 
	 
	
		| Page: | 
		13 | 
	 
	
		| Authors: | 
		Murray, S. S. | 
	 
	
	
		| Abstract: | 
		The Chandra X-ray Observatory achieved orbit on July 23, 1999, and began science observing in October 1999. Now over a year since the first light image of Cas-A, Chandra has observed several hundred science targets and many calibration objects. A few highlights from these data are presented - including a discussion of the spatially resolved spectrum of supernova ejecta in Cas-A and X-ray emission from the central regions of M31, the nearby AGN Cen-A, and the quasar 3C273. | 
	 
	
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