SOFIA
ED09-0279-15 This close up of SOFIA's German-built telescope assembly offers a view of both the primary and secondary mirrors, the latter a small black circle in the center supported by three braces. The white lower flexible door is seen on the bottom of the photo, while the aperture is the dark semi-circle on the right. The orange i
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https://www.nasa.gov/image-detail/sofia-143/
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