Breakwater, artificial offshore structure protecting a harbour, anchorage, or marina basin from water waves. Breakwaters intercept longshore currents and tend to prevent beach erosion.
photosphere. luminous, apparently opaque layer of gases that forms the visible surface of the sun sun,intensely hot, self-luminous body of gases at the center of the solar system.
The Sun's outer visible layer is called the photosphere and has a temperature of 6,000Â°C (11,000Â°F). This layer has a mottled appearance due to the turbulent eruptions of energy at the surface.