Philipp Johann Heinrich Fauth (19 March 1867 – 4 January 1941) was a German elementary school teacher and astronomer who excelled in lunar research conducted during forty years in his observatories in Landstuhl (Palatinate, Germany) and later Grünwald (Bavaria). Thanks to a donation he could afford one of the highest quality telescopes in Germany. By the unconditional defense of the unscientific glacial cosmogony or world ice theory conceived by Austrian engineer Hanns Hörbiger he succumbed to a mistake he did not admit all his life.