How to calculate the positions of the planets (in portuguese)
How to calculate the positions of the planets (in spanish)
Nice BASIC program used to calculate the positions of the planets (AR & DEC, draw a map of the sky with the orbits of the planets (heliocentric view above ecliptic or naked eye view from earth surface) (portuguese)
How to Transform Orbital Heliocentric Polar Coordinates
in Equatorial Geocentric Spherical CoordinatesHow to Transform Equatorial Coordinates
in Horizontal System Coordinates
