How to Make a DIY Solar Eclipse Viewer at Home
- A simple DIY solar eclipse viewer built from a cereal box or shoe box offers a safe, indirect way to watch celestial alignments without risking retinal damage, according...
- Building a homemade viewer requires very few items commonly found around the house.
A simple DIY solar eclipse viewer built from a cereal box or shoe box offers a safe, indirect way to watch celestial alignments without risking retinal damage, according to astronomy guides from outlets including Space.com and WeAreTeachers. When the moon passes directly between Earth and the sun, direct observation poses severe dangers, as unprotected exposure to ultraviolet and infrared rays can cause permanent vision loss. Without specifically designed solar filters or certified eclipse glasses, looking directly at the sun remains unsafe even when it is partially obscured. Instead of using regular sunglasses or peering through camera lenses and smartphones, backyard observers can construct a basic pinhole projector using common household supplies.
Materials Needed for a DIY Pinhole Projector
Building a homemade viewer requires very few items commonly found around the house. According to instructions outlined by WeAreTeachers and Space.com, builders will need a cardboard box with a lid—such as a standard shoe box or an empty cereal box—alongside a piece of aluminum foil, a sheet of white paper, tape, and a pushpin, thumbtack, or needle. A box cutter or pair of scissors is also required to cut viewing and light apertures.
Step-by-Step Construction Guide
- Take off the lid of the box and tape a small piece of white paper to the inside bottom at one end to act as an image screen, as detailed by WeAreTeachers.
- On the opposite end of the box, cut a small hole roughly one inch across near an edge, according to Space.com.
- Tape a piece of aluminum foil smoothly over that newly cut hole.
- Use a pin, needle, or pushpin to carefully punch one tiny hole right in the center of the foil sheet.
How to Safely Use Your Viewer
To operate the device during an eclipse event, users must stand with their back turned directly toward the sun, according to guidance from WeAreTeachers. Observers hold the box so that sunlight streams directly into the pinhole in the foil. By peering through the separate viewing aperture without covering the pinhole, viewers can spot a small bead of light on the white paper screen inside. As the moon crosses the face of the sun, observers will see a distinct shadow pass across that projected light beam.