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PHOTOS: Manhattanhenge illuminates New York City as crowds watch in awe

New Yorkers gathered in the streets on Monday night to watch as the sun set in alignment with the city grid, known as Manhattanhenge.

Manhattanhenge was inspired from Stonehenge, a prehistoric monument in England which displays a similar happening. Once a year, the sun rises in perfect alignment with the stones.

The New York City version of the event gained popularity in 2002 thanks to astrophysicist Neil deGrasse Tyson who coined the term in 2001.

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"... the setting Sun aligns precisely with the Manhattan street grid, creating a radiant glow of light across Manhattan's brick and steel canyons, simultaneously illuminating both the north and south sides of every cross street of the borough's grid," Tyson wrote in a blog post for the American Museum of Natural History.

Large crowds gather during each event on 23rd and 42nd street for some of the best views in the city. Mostly clear skies led to stunning views of the event on Monday night.