Old World meets modern in the Mova Rotating Antiqued Gloss Finish 4.5 in. diam. Globe. Here's a true scientific wonder that doubles as an artistic focal point for your home or office. The inner globe floats at a perfect point of balance between gravitational forces and the buoyant forces of surrounding fluids, and is brought to life by the energy of ambient light and by the force of the earth's magnetic field. Features low-light solar cell technology, so no batteries or power cords are required. Makes a perfect gift for the science buff or map enthusiast. About Mova Globes: By using a unique design, highly efficient solar cells, and the Earth's magnetic field, Mova has created a stunning line of globes that appear to rotate even though firmly rooted in place. This effect is created by placing a smaller globe inside the outer acrylic shell and filling the space between with a clear fluid. The inner globe floats in the center, while the solar cells and magnetic drive cause it to rotate.