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Solar projection

Solar projection devices

Miquel Collado from L'Aula del Cel (Astronomical Observatory, University of Valencia, Spain) shows you
hi-tech devices for solar observation

The "camera obscura" pinhole principle

one pinhole in a white cardboard

a second cardboard behind

and here comes the sun!

an small mirror with stickers

a white surface to focus

and the sun!

a white colander

perfect for eclipses!