Solar Eclipse Viewer
von jimjamurprint
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stlEclipse_2017.stl
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Beschreibung
A little eclipse 2017 viewer. DO NOT LOOK THROUGH THIS. It is meant to be used with your back facing the sun. I would imagine you could scale this to any size that you want.
The lady in the image is showing how this contraption is used.
http://i1.mirror.co.uk/incoming/article5350915.ece/ALTERNATES/s615b/Pinhole.jpg
http://www.mirror.co.uk/news/technology-science/science/solar-eclipse-2016-how-view-7488739