👉 In physics and mathematics, "covariant" refers to a concept that describes how quantities are interpreted in terms of different frames of reference. This means that the interpretation of physical quantities depends on which frame of reference one is using. For example, consider two inertial frames of reference (e.g., Earth and Moon). In an Earth-centered frame of reference, the Sun appears stationary to all observers. However, if we move from the Earth to the Moon, the observer's perspective changes because they are
