New Yorkers walking around lower Manhattan were mystified to see a massive rainbow appear in the city sky last evening around 8 p.m.

It wasn't a strange weather phenomenon or alien invasion, but an art installation set up in response to Hurricane Sandy. The rainbow, by artist Yvette Mattern, was made of seven laser beams projected from the top of The Standard hotel in Chelsea.

It was aimed at parts of New York City hit hardest by the storm, including the Rockaways, and was presented by the Art Production Fund with donations from Lightwave International.

If you're in New York City and you missed the show last night, the rainbow will be on display through November 29, from 8 p.m. to 2 a.m.

Have a good photo of the rainbow? Send it to jzeveloff@businessinsider.com and we'll add it in.