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Do a quick check of your eclipse glasses before you stare at the sun! If unsure, try a colander, pinhole in a piece of cardboard, or hold your binoculars so the big end points to the sun and the small end points at the ground to get a projection 🧪🔭 www.scientificamerican.com/article/how-...
How Do Solar Eclipse Glasses Protect Our Eyes?www.scientificamerican.com Solar eclipse glasses prevent catastrophic eye damage when observing the sun. Here’s how they work
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