Telescopes from the Ground Up Huygens’s 123-foot-long refractor Huygens’s open-air telescope had two short tubes at each end, to hold the lenses. The tubes were aligned with the help of a cord that ran between them. - Hold up - Document - PDFSEARCH.IO

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	Telescopes from the Ground Up Huygens’s 123-foot-long refractor Huygens’s open-air telescope had two short tubes at each end, to hold the lenses. The tubes were aligned with the help of a cord that ran between them. Add to Reading List Document Date: 2008-06-20 16:00:51 Open Document File Size: 319,29 KB Share Result on Facebook

Telescopes from the Ground Up Huygens’s 123-foot-long refractor Huygens’s open-air telescope had two short tubes at each end, to hold the lenses. The tubes were aligned with the help of a cord that ran between them.Add to Reading List