List of Cosmologists - P

P

• Thanu Padmanabhan (1957–) studied quantum gravity and quantum cosmology
• Leonard Parker established the study of quantum field theory within general relativity
• P. James E. Peebles (1935–) predicted cosmic background radiation, contributed to structure theory, developed models that avoid dark matter
• Roger Penrose (1931–) linked singularities to gravitational collapse, conjectured the nonexistence of naked singularities, and used gravitational entropy to explain homogeneity
• Arno Penzias (1933–) was the first to observe the cosmic background radiation
• Saul Perlmutter (1959–) used supernova observations to measure the expansion of the universe
• Joel Primack co-invented the theory of cold dark matter
• Ptolemy (90–168) wrote the only surviving ancient text on astronomy, conjectured a model of the universe as a set of nested spheres with epicycles