Parts of the US will get to see a total solar eclipse on August 21.
While the entire country will get to witness at least a partial eclipse, the lucky people who live along a 70-mile-wide streak will be able to see totality – when the moon crosses between the Earth and the sun, completely blocking out the sun's light.
For those who plan to watch the total solar eclipse in person or via livestream, there are a few key stages to keep an eye out for as the moon makes its way across the sun.
SEE ALSO: Here are the cities in the US where you'll get to see a total solar eclipse
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The eclipse kicks off with what's called first contact, when the moon starts to pass across the sun.
The moon will continue to cover up the sun, forming what's known as a crescent sun that looks like this.
After about an hour or so, the moon will almost completely block out the sun. At that point, you'll start to see a bright light radiate out of the sliver of distance between the sun and the moon, known as the "diamond ring."
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