The concept behind Nick Dong’s current show at Mercury 20 Gallery (475 25th St.), Cosmic Dance, came to the artist during a session of meditation. With the show, Dong aims to offer a collection of “unexplainable objects” that inhabit an ambiguous space between perception and reality. Indeed, the series of installations is both dazzling and bewildering. In “Ghost of Graviton,” what looks like a metallic talisman in the shape of a rounded cone levitates atop a whimsical wall-hanging pedestal and spins slowly in midair, projecting swirling light onto the gallery’s black walls. In “Force of Gravity,” a metallic cube rotates in the center of a mirrored, concave platform atop an upside-down pyramid inserted into a table. Hovering above the arrangement with no clear source, spots of light form a midair sculpture that slowly moves, as if breathing. There will be a closing reception for Dong’s show during First Friday on April 1 from 6–9 p.m. If you haven’t experienced the exhibit already, make sure not to miss it.