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Cessna 140, early flight survey

[Cessna 140]

About this image

The Cessna 140 (on the right) was used as part of the early site survey for the first US national observatory. Some of the initial survey work was carried out from the air, with ground-based follow-up work at promising sites. From the private collection of Dr Helmut Abt.

More: history page.


Minimum credit line: Helmut Abt/NOAO/AURA/NSF

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