New Yorkers have always quite mistakenly thought themselves at the center of the Universe. The new commission for the roof of the Metropolitan Museum of Art by Polish-German artist Alicja Kwade may sustain this conceit. Two large structures of interlocking rectangular steel frames precariously balance planet-like stone spheres. Their stark black outlines allow for glorious views of Central Park and its stately West Side skyline and are arranged so that they might collapse – much like a linear Hoberman sphere – into themselves. Hovering above the city, the arrangement suggests a figuration of planets and points to the metaphysical link between space and time. And yet, Kwade, who has always worked at the intersection between science and illusion, is acutely aware that the array of ultra-luxury skyscrapers on the southern side of the park, does not fit the picture. They stand tall but empty on what has been dubbed Billionaire’s Row, contemptuously looking down at the world that strives to go up. Kwade knows, of course, that this bizarre folly of mankind carries no weight as we hurl ourselves through space at 515,000 miles per hour. At the Metropolitan Museum of Art through October 27.