/**
 * @author Theodore Kruczek.
 * @license MIT
 * @copyright (c) 2022-2025 Theodore Kruczek Permission is
 * hereby granted, free of charge, to any person obtaining a copy of this
 * software and associated documentation files (the "Software"), to deal in the
 * Software without restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
import { AzEl, Degrees, Radians } from '../main.js';
/**
 * Celestial is a static class that provides methods for calculating the position of celestial objects such as the Sun,
 * Moon, and planets in the sky.
 */
export declare class Celestial {
    private constructor();
    /**
     * Calculates the azimuth and elevation of a celestial object at a given date, latitude,
     * longitude, right ascension, and declination.
     * @param date - The date for which to calculate the azimuth and elevation.
     * @param lat - The latitude of the observer.
     * @param lon - The longitude of the observer.
     * @param ra - The right ascension of the celestial object.
     * @param dec - The declination of the celestial object.
     * @returns An object containing the azimuth and elevation in degrees.
     */
    static azEl(date: Date, lat: Degrees, lon: Degrees, ra: Radians, dec: Radians): AzEl<Degrees>;
    /**
     * Atmospheric refraction in astronomy, refers to the bending of light as it passes through the Earth's
     * atmosphere. This effect is most noticeable for celestial objects like stars and planets when they are
     * close to the horizon. Here's a breakdown of how it works:
     *
     * Actual Position: Due to this bending of light, the apparent position of a celestial object is slightly
     * different from its true position in the sky. When a star or planet is near the horizon, the effect is more
     * pronounced because the light path passes through more of the Earth's atmosphere, which increases the amount of
     * bending.
     *
     * A familiar example of atmospheric refraction is observed during sunrise and sunset. The Sun appears to
     * be above the horizon when it is actually just below it. This is because the light from the Sun is bent
     * upwards as it passes through the atmosphere.
     * @param h - elevation
     * @returns refraction
     */
    static atmosphericRefraction(h: Radians): Radians;
    /**
     * Calculate the declination. Similar to latitude on Earth, declination is another celestial coordinate.
     * It measures how far north or south an object is from the celestial equator
     * @param l - ecliptic longitude
     * @param b - ecliptic latitude
     * @returns declination
     */
    static declination(l: number, b: number): Radians;
    /**
     * Calculate the right ascension. This is a celestial coordinate used to determine the position of objects
     * in the sky. It's analogous to longitude on Earth. Right Ascension indicates how far east an object is
     * from the vernal equinox along the celestial equator.
     * @param l - ecliptic longitude
     * @param b - ecliptic latitude
     * @returns right ascension
     */
    static rightAscension(l: number, b: number): Radians;
    /**
     * Calculate the elevation. Elevation, or altitude, is the angle between an object in the sky and the
     * observer's local horizon. It's commonly expressed in degrees, where 0 degrees is right at the horizon
     * and 90 degrees is directly overhead (the zenith), but we are using radians to support trigonometric
     * functions like Math.sin() and Math.cos().
     * @param H - siderealTime
     * @param phi - latitude
     * @param dec - The declination of the sun
     * @returns elevation
     */
    static elevation(H: number, phi: Radians, dec: Radians): Radians;
    /**
     * Calculate the azimuth. This is a compass direction measurement. Azimuth measures the angle along
     * the horizon from a specific reference direction (usually true north) to the point where a vertical
     * line from the object intersects the horizon.
     * @param H - siderealTime
     * @param phi - latitude
     * @param dec - The declination of the sun
     * @returns azimuth in rad
     */
    static azimuth(H: number, phi: Radians, dec: Radians): Radians;
}