The AMNH explained on its website that the phenomenon occurs when the 'setting Sun aligns precisely with the Manhattan street grid.' This setting creates a glowing light across 'Manhattan's brick ...

According to the American Museum of Natural History, the spectacle occurs when the "setting sun aligns precisely with the Manhattan street grid, creating a radiant glow of light across Manhattan's ...

as seen from any east-west street in Manhattan. The bi-annual event's nickname comes, of course, from England's Stonehenge, where the rising sun on June's summer solstice aligns with the neolithic ...