TerraForm Power, Inc. operates clean power generation assets such as solar, wind, natural gas, geothermal and hydro-electricity. The Company also operates hybrid power generation assets.
Definition of a Sphere A sphere is a geometrical figure that is perfectly round, 3-dimensional and circular - like a ball. Geometrically, a sphere is defined as the set of all points equidistant from a single point in space.
Definition of surface. 1  1 : the exterior or upper boundary of an object or body on the surface of the water the earth's surface. 2  2 : a plane or curved two-dimensional locus of points (as the boundary of a three-dimensional region) plane surface surface of a sphere. 3a : the external or superficial aspect of something trouble lurks below the surfaceb : an external part or layer sanded the rough surfaces.