The Economist explains

The meaning of Manhattanhenge

By R.W. | NEW YORK

WHEN traffic lights changed to red on the evening of July 11th, hundreds of New Yorkers raced out to the middle of Manhattan’s roads, cameras in hand, safety be damned. They faced west, where the setting sun was lighting up the sky. The skyscrapers and high-rises framed the firey orb which lit up the surrounding glass, brick and stone buildings spectacularly. For the next 15 minutes or so, the pattern repeated. Traffic lights changed, the sun worshippers took to the street to capture the stunning sight, until the sun disappeared. The cosmic phenomenon is known as Manhattanhenge, or the Manhattan Solstice.

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