Manhattanhenge turned out to be a mixed bag for spectators this weekend.
The sun aligned precisely with the street grid of Manhattan both Sunday and Monday evenings, and hundreds of spectators crowded the popular viewing cross streets -- like 14th, 23rd, 34th, 42nd and 57th streets -- for a look.
Social media turned up both spectacular shots and some grumblings from disappointed onlookers about the cloud cover.
Manhattanhenge happens twice a year. The earlier instance this year, in May, was marred by clouds.
On a clear day, the typical resulting effect of Manhattanhenge is a "radiant glow of light" across the skyscrapers and buildings, "simultaneously illuminating both the north and south sides of every cross street of the borough's grid," according to Hayden Planetarium.
The term was coined by the the famous astrophysicist Neil deGrasse Tyson, also Hayden Planetarium's director.