What’s a Heliostat?

An apparatus containing a movable or driven mirror, used to reflect sunlight in a fixed direction.    As the sun moves across the sky, a heliostat makes small adjustments to the position of a mirror in order to keep reflected light on a target.   The larger the mirror mounted on the heliostat, the more energy and light is delivered to the target.  Multiple heliostats can reflect light onto the same target to deliver large amounts of heat and light.