Peebles was awarded half of the Nobel Prize in Physics in 2019 for his theoretical discoveries in physical cosmology. He shared the prize with Michel Mayor and Didier Queloz for their discovery of an exoplanet orbiting a sun-like star. While much of his work relates to the development of the universe from its first few seconds, he is more skeptical about what we can know about the very beginning, and stated, "It's very unfortunate that one thinks of the beginning whereas in fact, we have no good theory of such a thing as the beginning."
Peebles has described himself as a convinced agnostic.
Peebles was born on April 25, 1935 in St. Boniface, in present-day Winnipeg, Manitoba, Canada, the son of Ada Marion (Green), a homemaker, and Andrew Charles Peebles, who worked for the Winnipeg Grain Exchange. He completed his bachelor of science at the University of Manitoba. He then went on to pursue graduate studies at Princeton University, where he received his Ph.D. in physics in 1962, completing a doctoral dissertation titled "Observational Tests and Theoretical Problems Relating to the durateston Conjecture That the Strength of the Electromagnetic Interaction May Be Variable" under the supervision of Robert Dicke. He remained at Princeton for his whole career. Peebles was a Member in the School of Natural Sciences at the Institute for Advanced Study during the academic year 1977–78; he made subsequent visits during 1990–91 and 1998–99.
Most of Peebles' work since 1964 has been in the field of physical cosmology to determine the origins of the universe. In 1964, there was very little interest in this field and it was considered a "dead end" but Peebles remained committed to studying it. Peebles has made many important contributions to the Big Bang model. With Dicke and others (nearly two decades after George Gamow, Ralph A. Alpher and Robert C. Herman), Peebles predicted the cosmic microwave background radiation. Along with making major contributions to Big Bang nucleosynthesis, dark matter, and dark energy, he was the leading pioneer in the theory of cosmic structure formation in the 1970s. Long before it was considered a serious, quantitative branch of physics, Peebles was studying physical cosmology and has done much to establish its respectability. Peebles said, "It was not a single step, some critical discovery that suddenly made cosmology relevant but the field gradually emerged through a number of experimental observations. Clearly one of the most important during my career was the detection of the cosmic microwave background (CMB) radiation that immediately attracted attention [...] both experimentalists interested in measuring the properties of this radiation and theorists, who joined in analyzing the implications". His Shaw Prize citation states "He laid the foundations for almost all modern investigations in cosmology, both theoretical and observational, transforming a highly speculative field into a precision science."
Peebles' body of work was recognized with him being named a 2019 Nobel Laureate in Physics, "for theoretical discoveries in physical cosmology"; Peebles shared half the prize with Michel Mayor and Didier Queloz who had been the first to discover an exoplanet around a main sequence star.
Peebles, J. P. E. (2009). Finding the Big Bang (1st ed.). Cambridge University Press.
Peebles, P. J. E. (1980). Large-Scale Structure of the Universe. Princeton University Press.
Peebles, P. J. E. (1992). Quantum Mechanics (1st Printing ed.). Princeton University Press.
Peebles, P. J. E. (1993). Principles of Physical Cosmology (n ed.). Princeton University Press.
Peebles, P. J. E. (2020). Cosmology’s Century. Amsterdam University Press.
Davis, M.; Peebles, P. J. E. (1983). "A survey of galaxy redshifts. V – The two-point position and velocity correlations". Astrophys. J. 267: 465. Bibcode:1983ApJ...267..465D. doi:10.1086/160884.
Dicke, R. H.; Peebles, P. J. E.; Roll, P. G.; Wilkinson, D. T. (1965). "Cosmic Black-Body Radiation". Astrophys. J. 142: 414. Bibcode:1965ApJ...142..414D. doi:10.1086/148306.
Fukugita, M.; Hogan, C. J.; Peebles, P. J. E. (1998). "The cosmic baryon budget". Astrophys. J. 503 (2): 518. arXiv:astro-ph/9712020. Bibcode:1998ApJ...503..518F. doi:10.1086/306025. S2CID 15836730.
Groth, E. J.; Peebles, P. J. E. (1977). "Statistical Analysis Of Catalogs Of Extragalactic Objects. 7. Two And Three Point Correlation Functions For The High-Resolution Shane-Wirtanen Catalog Of Galaxies". Astrophys. J. 217: 385. Bibcode:1977ApJ...217..385G. doi:10.1086/155588.
Ostriker, J. P.; Peebles, P. J. E. (1973). "A Numerical Study of the Stability of Flattened Galaxies: or, can Cold Galaxies Survive?". Astrophys. J. 186: 467. Bibcode:1973ApJ...186..467O. doi:10.1086/152513.
Peebles, P. J. E. (1966). "Primordial Helium Abundance and the Primordial Fireball. I". Phys. Rev. Lett. 16 (10): 410. Bibcode:1966PhRvL..16..410P. doi:10.1103/PhysRevLett.16.410.
Peebles, P. J. E. (1966). "Primordial Helium Abundance and the Primordial Fireball. II". Astrophys. J. 146: 542. Bibcode:1966ApJ...146..542P. doi:10.1086/148918.
Peebles, P. J. E.; Dicke, R. H. (1968). "Origin of the Globular Star Clusters". Astrophys. J. 154: 891. Bibcode:1968ApJ...154..891P. doi:10.1086/149811.
Peebles, P. J. E. (1969). "Origin of the Angular Momentum of Galaxies". Astrophys. J. 155: 393. Bibcode:1969ApJ...155..393P. doi:10.1086/149876.
Peebles, P. J. E.; Yu, J. T. (1970). "Primeval adiabatic perturbation in an expanding universe". Astrophys. J. 162: 815. Bibcode:1970ApJ...162..815P. doi:10.1086/150713.
Peebles, P. J. E. (1971). Physical Cosmology. Princeton: Princeton University Press.
Peebles, P. J. E. (1980). The large-scale structure of the universe. Princeton: Princeton University Press.
Peebles, P. J. E. (1982). "Large-scale background temperature and mass fluctuations due to scale-invariant primeval perturbations". Astrophys. J. 263: L1. Bibcode:1982ApJ...263L...1P. doi:10.1086/183911.
Peebles, P. J. E. (1992). Quantum Mechanics. Princeton: Princeton University Press.
Peebles, P. J. E. (1993). Principles of Physical Cosmology. Princeton: Princeton University Press.
Ratra, B.; Peebles, P. J. E. (1988). "Cosmology with a time-variable cosmological 'constant'". Astrophys. J. 325: L17. Bibcode:1988ApJ...325L..17P. doi:10.1086/185100.
Ratra, B.; Peebles, P. J. E. (1988). "Cosmological consequences of a rolling homogeneous scalar field". Phys. Rev. D. 37 (12): 3406–3427. Bibcode:1988PhRvD..37.3406R. doi:10.1103/physrevd.37.3406. PMID9958635.
Ratra, B.; Peebles, P. J. E. (2003). "The cosmological constant and dark energy". Rev. Mod. Phys. 75 (2): 559–606. arXiv:astro-ph/0207347. Bibcode:2003RvMP...75..559P. doi:10.1103/RevModPhys.75.559. S2CID 118961123.
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