Kepler solar array
The business end of Kepler is its photometer, a 0.95-meter telescope with a field of view of 105 square degrees--"comparable," NASA says, "to the area of your hand held at arm's length." Such a relatively large field of view for an astronomical telescope is needed so that Kepler can monitor the brightness of 100,000 stars.
March 5, 2009 3:57 PM PST
Photo by: NASA and Ball Aerospace
| Caption by: Jonathan Skillings
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