/**
 * https://en.wikipedia.org/wiki/Earth_radius
 */
export declare const EARTH_RADIUS: import("../unit.js").Quantity<6371000>;
/**
 * At equator
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Earth%27s_circumference
 */
export declare const EARTH_CIRCUMFERENCE: import("../unit.js").Quantity<40075017>;
/**
 * Using equatorial mean as alternative to {@link G0}.
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Gravity_of_Earth
 */
export declare const EARTH_GRAVITY: import("../unit.js").Quantity<9.78033>;
/**
 * Standard gravity
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Standard_gravity
 */
export declare const G0: import("../unit.js").Quantity<9.80665>;
/**
 * https://nssdc.gsfc.nasa.gov/planetary/factsheet/earthfact.html
 */
export declare const EARTH_MASS: import("../unit.js").Quantity<5.9722e+24>;
/**
 * Gravitational constant (kg-1·m3·s-2)
 *
 * @remarks
 * Reference:
 * https://en.wikipedia.org/wiki/Gravitational_constant
 */
export declare const GRAVITATION: import("../unit.js").Quantity<6.6743e-11>;
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