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History of Physics and Astronomy


This version sorts the important events by name. The lifetimes of people are highlighted in blue, important people are in bold blue.

P

Pallas - second asteroid discovered - Heinrich Olbers 1802
Palomar 200" reflector completed and goes into operation 1948
Parabolic mirrors free from spherical aberration 1629
Parallax measurement of distance of 61 Cygni Bessel, Henderson, Struve 1838
Parity violation in weak decays - Chien-Shiung Wu 1957
Pascal 1623-1662
Pathfinder first roving robot on Mars 1997
Pauli 1900-1958
Pauli Nobel prize for Physics 1945
Pauli exclusion principle 1925
Pearl, Reines Nobel prize for Physics 1995
Pendulum clock Huygens 1656
Pendulum theory Galileo (?1582)1581
Pentode 1929
Perrin, Jean Perrin tube 1870-1942
Perrin Nobel prize for Physics 1926
Phase contrast microscope Zernike 1934
Philosophical transactions of the Royal Society first appeared 1665
Photocell selenium 1873
Photoelastic effect - Brewster 1816
Photoelectric effect discovered - Hallwachs 1887
Photoelectric cell 1905
Photoelectric equation Millikan 1916
Photoelectricity 1839
Photography 1814
Photometer wax block photometer 1884
Photometric source standard melting platinum 1939
Photomultiplier tube 1947
Photon theory for photoelectric effect - Albert Einstein 1905
Phototelegraphy Abbe Caselli 1862
Pi meson discovered 1947
Piezo electric effect P and J. Curie 1880
Pioneer 4 - orbit round the Sun 1959
Pisa - weights dropped from the tower by Galileo (?)1591
Plague and fire of London 1665-1666
Planck 1858-1947
Planck Nobel prize for Physics 1918
Planck's constant - measurement by Millikan 1912
Planetary model of the atom proposed - Hantaro Nagaoka 1904
Plate glass invented in Normandy 1688
Plato 427-347 BC
Pliny watching gladiators through an emerald 77
Pluto - New Horizons mission launched on January 19th 2006 at 19:00 UT 2006
Pluto discovered 1930
Plutonium bomb USSR 1949
Plutonium discovered 1942
Poincare 1854-1912
Polarisation rotation of plane of polarisation in a magnetic field 1845
Polarisation by reflection Etienne Malus 1808
Polarisation in Iceland spar double refraction - Bartholinus 1669
Polarisation of light Huygens 1678
Polarisation of starlight by interstellar dust observed 1949
Polarisation using Herapathite 1852
Polaroid invented Land 1932
Polonium discovered 1898
Pope Sylvester III labels beads in the abacus 99
Positive and negative electricity - Franklin 1740
Positive ray analysis neon isotopes 1913
Positron discovered Anderson 1932
Positronium 1951
Potential in electricity - Green 1828
Potentiometer - Poggendorff 1841
Powell Nobel prize for Physics 1950
Prevost's theory of exchanges heat 1792
Principia published 1687
Principle of unitary symmetry 1964
Printing invented 1450
Printing press - Caxton 1476
Proton name suggested by Rutherford 1920
Prototype calculating machine - Charles Babbage 1822
Ptolemy 70-147
Pulleys 900 BC
Pulsar first optical identification in Crab nebula 1969
Pulsars Bell and Antony 1967
Pythagoras 572-492 BC
 
 
 
© Keith Gibbs 2007