There are few places in Wisconsin that can claim as many discoveries as the Yerkes Observatory near Lake Geneva. The Observatory is more than a century old and houses the world’s largest refracting ...
Explore Scientific’s 9mm 120° Series Argon-Purged Waterproof Deep Sky Eyepiece offers a 120° apparent field of view and 13 millimeters of eye relief. The unit features 12 optical elements and 15 ...
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