: His investigations into astronomical alignments extend to pyramid sites in Teotihuacán (Mexico) and Shaanxi (China) .
: His technical expertise lies in instrumentation engineering and the study of fracture toughness in brittle materials like ceramics and polymers. One of his primary projects involved developing methods to control and analyze stable crack growth. Pyramid Research & Theories Hans Jelitto
: He authored the book Pyramiden und Planeten ("Pyramids and Planets"), where he proposes that the arrangement of the Giza pyramids in Egypt corresponds to the orbital positions of the inner planets (Mercury, Venus, and Earth) at a specific point in time. : His investigations into astronomical alignments extend to