Once every 18 months or so, as the Earth, moon, and sun perform a cosmic ballet, something spectacular happens. The moon passes directly in front of the sun, and from certain places on Earth, day becomes night.
This is a total solar eclipse. Though they happen quite regularly, they are only visible from any given location about once every 375 years.
Canadians got to glimpse a partial eclipse on Monday, while much of the United States was treated to the aforementioned total solar eclipse.
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