Frank Gehry's Balls?

I have just visited the Guggenheim Museum in Bilbao again, this time to see the Andy Warhol Shadows and the exhibition on the Paris School 1900-1945. 

Having satiated myself with Picasso, Kandinsky, Delaunay, Braque et al, I came outside and saw this sculpture.

Frank Gehry was the architect who designed the museum. Are these his balls?

The little black stick in the middle of every sphere is a reflection of me taking the photograph.

At last, my genius is reflected in a work of art.