How to Make a Solar Eclipse & Sun Viewer I Exploratorium
Why the open web links it
Demonstrates how to build a safe, homemade solar viewer for observing eclipses and sunspots.
Linked by 4 independent sites, 3 of them widely read in the 2026-10 crawl of the open web, including ibtimes.co.uk, fox5dc.com, fox7austin.com, my9nj.com.