The main show begins at 1 p.m. and will cover the path of totality the eclipse will take across the United States, from OR to SC. As the moon passes by the sun, the moon completely blocks the sunlight in an area of total eclipse and blocks a portion of the sun's light in areas of partial eclipse.
Even as makers of certified, safety-tested solar eye ware rushed to meet surging demand before the August 21 eclipse, they have joined astronomers and optometrists in warning of defective knockoffs flooding the US market. Watching the celestial event is a rare experience, but it also carries a lot of dangers. They are being distributed one per person on a first come first serve basis while supplies last. Never look directly at the sun without eye protection, even briefly. Outside of the path of totality, always use solar filters. Solar view glasses and pinhole cameras also will be available to the public.More news: CIA director: 'No intelligence' to suggest United States on cusp of nuclear war
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The American Astronomical Society has listed manufacturers of eclipse glasses on their site, which are verified to be compliant with the ISO 12312-2 worldwide safety standard. The optical device concentrates the sun's light, which can damage the solar viewer and then your eyes.