Pascal Hilkens Astro Page
Personal blog to promote (solar) astronomy and other related sciences.
Pascal Hilkens Astro Home Page
Pascal Hilkens Astro Home Page
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Solargraphy
Helios Astronomy Club
Saturday, December 14, 2013
Solargraph (1)
We are heading december 21, so I'm preparing my cans with photo paper. Thuis year I will install two solargraphs.
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