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
Friday, February 14, 2020
Helping Science - Val U Sun
It's always nice to help science. This time it was about calibrating old solar drawings in view of digitazing them.
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