Astronomy Tools

solar_system_source(name[, time, observer])	Returns a Solar System body in the ICRS reference system.
local_sidereal_time(time[, observer, ...])	Computes the Local Sidereal Time.
hour_angle(radec, time[, observer, fast_compute])	Local Hour Angle of an object in the observer's sky.
radec_to_altaz(radec, time[, observer, ...])	Converts a celestial object equatorial coordinates to horizontal coordinates.
altaz_to_radec(altaz[, fast_compute])	Converts a celestial object horizontal coordinates to equatorial coordinates.
sky_temperature([frequency])	Sky temperature at a given frequency frequency (strongly dominated by Galactic emission).
dispersion_delay(frequency, dispersion_measure)	Dispersion delay induced to a radio wave of frequency (\(\nu\)) propagating through an electron plasma of uniform density \(n_e\).
wavelength([frequency])	Converts an electromagnetic frequency to a wavelength.
l93_to_etrs(positions)	Transforms Lambert93 coordinates to ETRS (European Terrestrial Reference System).
geo_to_etrs([location])	Transforms geographic coordinates to ETRS (European Terrestrial Reference System).
etrs_to_enu(positions[, location])	Local east, north, up (ENU) coordinates centered on the position location.