This is the fourth lecture that introduces you to some stars in the southern hemisphere, Toliman, Agena and Acrux. We then move to Sagittarius and look at Rukbat and Facies, followed by the stars of Libra those of Zuben Elgenubi and Zuben Eschamali. From Libra we move to Scorpio and consider Antares, Aculeus and Acumen. The lecture ends with considering the two heads in the sky, Ras Alhague and Ras Algethi.