How to Make a Pinhole Projector to View the Solar Eclipse
Why the open web links it
Teaches how to build a safe, simple pinhole projector for viewing a solar eclipse.
Linked by 25 independent sites, 6 of them widely read in the 2026-10 crawl of the open web, including nasa.gov, washington.edu, digitaltrends.com, wsu.edu, theweathernetwork.com.