👉 A palatometer is a device used in astronomy to measure the temperature of celestial bodies. It consists of a metal plate with an indentation on one side, which is heated by a bulb or other source of heat. The indentation can be set at any angle relative to the plane of the plate and the position of the bulb determines how much heat is applied. The temperature of the celestial body is then determined by measuring the difference between the indentation and the ambient air temperature.
