👉 In physics and astronomy, a "frigid" state is an extremely cold temperature. It can be defined as the absolute zero of temperature, meaning that there are no heat or light entering or leaving a system at this temperature. For example, in the Earth's atmosphere, which is considered to have a temperature of -273.15°C (0 K), all forms of radiation and light (except for visible light) are completely absorbed by the ozone layer, making it extremely cold.
