Paul Santorini (1893–1986) was a distinguished Greek civil engineer, physicist, mathematician, and astronomer who published over 350 scientific articles across fields including solar energy, electromagnetic microwaves, high-frequency waves, and cosmology. He is best known in UAP research circles for leading the Greek government's investigation into the 1946 Ghost Rockets phenomenon.

Born in Odesa to a Greek father and Italian mother, Santorini was educated at prestigious institutions in Zurich, including the Swiss Federal Institute of Technology (ETH Zurich). He later held professorships at the University of Athens, the National Technical University of Athens, and the Agricultural University of Athens.

In September 1946, following widespread sightings of mysterious aerial objects over Greece, Santorini was appointed to lead a secret government committee investigating the phenomenon. His conclusion—that the objects "were not missiles"—was notable, but the investigation was abruptly ordered stopped after consultation with foreign officials, a detail that has fueled speculation about official suppression of UFO evidence.

Santorini's other notable achievements include developing the Hellenic Radar system and contributing guidance systems for Project Nike. Late in life, he proposed the "multiple successive small bangs" theory of the universe. He was awarded the Order of the Phoenix by the Greek government.