Next: Chandra X-ray Observatory Operations . ... 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. ... It was selected as the official first light image for Chandra because of its complex spatial extent and its high X-ray brightness. ... Figure 4: The nucleus of M31 as seen in X-rays by Chandra . ...

... See you all on February 8th! ... David Lechter, Outreach Chair 2 February 2011 Amateur Astronomers Association of Princeton Mars Rovers Celebrate 7th Anniversary on the Red Planet NASA's twin Mars rovers Spirit and Opportunity surely rank as one of the greatest triumphs in the history of space exploration. ... 4 February 2011 Amateur Astronomers Association of Princeton Opportunity is driving to different vantage points around the steep walled crater and snapping a series of gorgeous Martian vistas....