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Build a Twilight Photometer to Detect Stratospheric Particles

Build a Twilight Photometer to Detect Stratospheric Particles

Have you wondered why some sunsets are so spectacular and others so drab? This ultra-sensitive photometer project will allow you to tease out the secrets of twilight and even do serious science by finding the altitude of the dust, smoke, and air pollution that influence the colors of twilight.

Smartphone Microscope

Smartphone Microscope

Take amazing high-magnification photos with your own phone and the lens from a cheap laser pointer.