The Great Conjunction is a great celestial event that plays a very significant role in the 1982 dark fantasy film The Dark Crystal. This event that occurs when the three suns of the planet Thra - the Great Sun, the Rose Sun, and the Dying Sun - align in the sky. The alignment of the suns form an intense beam of light that shines directly onto the Crystal. A Great Conjunction occurs every nine-hundred and ninety-nine trine and one trine.