astro_angle_from_sun    Angle from the Sun
astro_bary_state        Barycentric position and velocity vectors
astro_body              Celestial body codes
astro_body_code         Get the integer code for a celestial body by
                        name
astro_body_name         Get the name of a celestial body
astro_combine_rotation
                        Combine two rotation matrices
astro_current_time      Current UTC time according to Astronomy Engine
astro_ecliptic          Convert J2000 equatorial coordinates to
                        ecliptic coordinates
astro_ecliptic_longitude
                        Heliocentric ecliptic longitude of a body
astro_elongation        Elongation of a celestial body
astro_equator           Topocentric equatorial coordinates of a
                        celestial body
astro_equator_from_vector
                        Convert Cartesian Vector to Equatorial
                        Coordinates
astro_geo_vector        Geocentric position vector of a celestial body
astro_helio_vector      Heliocentric position vector of a celestial
                        body
astro_horizon           Horizontal coordinates of a celestial body
astro_horizon_from_vector
                        Convert Cartesian Vector to Horizontal
                        Coordinates
astro_hour_angle        Calculate the hour angle of a body
astro_identity_matrix   Create an identity rotation matrix
astro_illumination      Illumination data for a celestial body
astro_inverse_rotation
                        Calculate the inverse of a rotation matrix
astro_make_time         Create an astronomical time value
astro_moon_phase        Moon Phase Angle
astro_next_lunar_eclipse
                        Find the next lunar eclipse in a series
astro_next_moon_quarter
                        Find Next Lunar Quarter
astro_next_transit      Search for the next transit of Mercury or Venus
astro_observer_gravity
                        Observer gravitational acceleration
astro_observer_state    Observer position and velocity vector from
                        geographic coordinates
astro_observer_vector   Observer position vector from geographic
                        coordinates
astro_pair_longitude    Ecliptic longitude of one body relative to
                        another
astro_pivot             Re-orient a rotation matrix by pivoting around
                        an axis
astro_rotate_vector     Apply a rotation to a vector
astro_rotation_ECL_EQD
                        Rotation Matrix from J2000 Ecliptic to
                        Equatorial of-Date
astro_rotation_ECL_EQJ
                        Rotation Matrix from ECL to EQJ
astro_rotation_ECL_HOR
                        Rotation Matrix from ECL to HOR
astro_rotation_ECT_EQD
                        Rotation Matrix from ECT to EQD
astro_rotation_ECT_EQJ
                        Rotation Matrix from ECT to EQJ
astro_rotation_EQD_ECL
                        Rotation Matrix from Equatorial of-Date to
                        J2000 Ecliptic
astro_rotation_EQD_ECT
                        Rotation Matrix from EQD to ECT
astro_rotation_EQD_EQJ
                        Rotation Matrix from EQD to EQJ
astro_rotation_EQD_HOR
                        Rotation Matrix from EQD to HOR
astro_rotation_EQJ_ECL
                        Rotation Matrix from EQJ to ECL
astro_rotation_EQJ_ECT
                        Rotation Matrix from EQJ to ECT
astro_rotation_EQJ_EQD
                        Rotation Matrix from EQJ to EQD
astro_rotation_EQJ_GAL
                        Rotation Matrix from EQJ to GAL
astro_rotation_EQJ_HOR
                        Rotation Matrix from J2000 Equatorial to
                        Horizontal
astro_rotation_GAL_EQJ
                        Rotation Matrix from GAL to EQJ
astro_rotation_HOR_ECL
                        Rotation Matrix from HOR to ECL
astro_rotation_HOR_EQD
                        Rotation Matrix from HOR to EQD
astro_rotation_HOR_EQJ
                        Rotation Matrix from Horizontal to J2000
                        Equatorial
astro_search_altitude   Search for when a body reaches a specified
                        altitude
astro_search_hour_angle
                        Search for when a body reaches a specified hour
                        angle
astro_search_lunar_eclipse
                        Search for a lunar eclipse
astro_search_max_elongation
                        Search for maximum elongation
astro_search_moon_phase
                        Search for a Specific Moon Phase
astro_search_moon_quarter
                        Find First Lunar Quarter
astro_search_peak_magnitude
                        Search for peak magnitude of Venus
astro_search_relative_longitude
                        Search for relative longitude event between
                        Earth and another planet
astro_search_rise_set   Search for the next rise or set time of a
                        celestial body
astro_search_sun_longitude
                        Search for Sun longitude
astro_search_transit    Search for a transit of Mercury or Venus
astro_seasons           Equinoxes and Solstices for a Given Year
astro_sphere_from_vector
                        Convert Cartesian Vector to Spherical
                        Coordinates
astro_sun_position      Sun's position in ecliptic coordinates
astro_vector_from_horizon
                        Convert Horizontal Coordinates to Cartesian
                        Vector
astro_vector_from_sphere
                        Convert Spherical Coordinates to Cartesian
                        Vector
astro_vector_observer   Geographic coordinates from observer position
                        vector
next_global_solar_eclipse
                        Search for the next global solar eclipse
next_local_solar_eclipse
                        Search for the next local solar eclipse
next_lunar_apsis        Find the next lunar apsis event
next_planet_apsis       Find the next planetary apsis in a series
search_global_solar_eclipse
                        Search for a global solar eclipse
search_local_solar_eclipse
                        Search for a local solar eclipse
search_lunar_apsis      Search for lunar apsis events
search_planet_apsis     Search for the next planetary apsis
