Oberth;Oberth, Hermann Julius: 1894 to 1989, space travel pioneer
Observatories;Astronomical, metereological or geophysical monitoring stations. However, the term usually refers to astronomical observatories equipped with one or more powerful telescopes.
Observatory;Building used scientific observation, recording and evaluation of phenomena and occurrences in space.
OechelhΣuser;OechelhΣuser, Wilhelm von: 1854 to 1923, engineer
Oersted;Oersted, Hans Christian: 1777 to 1851, physicist
Ohm;Ohm, Georg Simon: 1787 to 1854, physicist
Oliphant;Oliphant, Marcus Laurence Elwin: (* 1901), physicist
Oppenheimer;Oppenheimer, Robert: 1904 to 1967, physicist
Optical;Optical may either mean perceiving something with eyes, or equipped with lenses or mirrors (instruments).
Optics ;Optics is concerned with the creation, diffusion and perception of light. Discoveries in the field of optics have led to a plethora of applications in telescopes, cameras, microscopes, lasers etc.
Oscillations;An oscillation means a periodic variation of a property in a physical system. It may include not only oscillations of air or liquids, but also oscillations in a magnetic and electric field.
Ostwald;Ostwald, Wilhelm: 1853 to 1932, chemist
Otis;Otis, Elisha Graves: 1811 to 1861, mechanic
Otto;Otto, Nikolaus August (1832-1891), German engine manufacturer and entrepreneur
Pacinotti;Pacinotti, Antonio: 1841 to 1912, physicist
Page;Page, Charles Grafton: 1812 to 1868, physician
PAL System;PAL is the abbreviation for Phase Alternating Lens. This is a color television system introduced since 1967 in Western Europe as well as in many non-European countries, with the exception of France where the Secam standard is used.
Paneth;Paneth, Friedrich Adolf: 1887 to 1958, chemist
Pape;Pape, Jean Henri: 1789 to 1875, machine manufacturer
Papin;Papin, Denis (1647-1714), French physicist and inventor
Papyrus;Papyrus was used in antiquity as a writing material. It was obtained from the pulp of papyrus reeds.
Paracelsus;Paracelsus, (pseudonym for Philippus Aureolus Theophrastus Bombastus von Hohenheim): 1493 to 1541, Swiss-German physician, philosopher and naturalist
Parker;Parker, Louis W.: 1906 to 1993, engineer
Parseval;Parseval, August von: 1861 to 1942, engineer and aviation pioneer
Parsons;Parsons, Charles Algernon (1854-1931), British engineer
Pascal;Pascal, Blaise: 1623 to 1662, mathematician, physicist and philosopher
Paschen;Paschen, Friedrich Luis Heinrich: 1865 to 1947, physicist
Pasteur;Pasteur, Louis: 1822 to 1895, chemist and biologist
PathΘ;PathΘ, Charles: 1863 to 1957, film pioneer
Pauli;Pauli, Wolfgang: 1900 to 1958, physicist
Pauling;Pauling, Linus Carl: 1901 to 1994, chemist
Pecqueur;Pecqueur, OnΘsiphore: 1792 to 1852, engineer
Peltier;Peltier, Jean-Charles-Athanase: 1785 to 1845, precision engineer and physicist
Pelton;Pelton, Lester Allen: 1829 to 1908, engineer
PΘnaud;PΘnaud, Alphonse: 1850 to 1880, aviation pioneer
Penn;Penn, John: 1805 to 1878, machine manufacturer
PΘrier;PΘrier, Constantine Jacques: 1742 to 1818, machine manufacturer
Perkin;Perkin, William Henry: 1838 to 1907, chemist
Permanent magnet;A permanent magnet retains its magnetism and is made of a hard magnetic material. Its magnetic field does not change over time.
Petrina;Petrina, Franz Adam: 1799 to 1855, physicist
Philon;Philon of Byzantium: c. 250 BC, scientist
Photosynthesis;Light energy is converted into chemical energy. This energy helps to store the CO▓ present in the air and water organically as glucose.
Piccard;Piccard, Auguste: 1884 to 1962, physicist and engineer
Pier;Pier, Mathias: 1881 to 1965, chemist
Piston;A piston is a cylindrical machine part which slides in and out of cylinders. It transmits energy through up- and downstrokes.
Piston engine;A piston engine is used to transmit combustion energy by means of a piston to a power plant
Pitot;Pitot, Henri: 1695 to 1771, engineer
Pits;Pits are the term for the millions of microscopic depressions on a CD, on which data such as music is stored. They are scanned by a laser beam and converted via a digital to analog converter into audio signals.
Pixel;Pixel is the abbreviation for picture element. A dot on a monitor or TV screen is a pixel.
Plane of the equator;Plane of the equator: Plane composed of the celestial equator perpendicular to the axis of the north and south poles.
Planet;Large, rotating celestial body, which is held in an orbit around a star by attractive force.
Plank;Plank, Charles J.: 1915 to 1989, physical chemist
Plank;Plank, Max Karl Ernst Ludwig: 1858 to 1947, physicist
Plateau;Plateau, Joseph Anton Fernand: 1801 to 1883, physicist
Pliny;Pliny the Elder (full name: Gaius Plinius Secundus): 23-79 AD, writer and naturalist
Plⁿcker;Plⁿcker, Julius: 1801 to 1868, mathematician and physicist
Plunkett;Plunkett, Roy J.: 1910 to 1994, chemist
Poggendorf;Poggendorf, Johann Christian: 1796 to 1877, physicist
PoincarΘ;PoincarΘ, Jules Henri: 1854 to 1912, mathematician
Poiseuille;Poiseuille, Jean-Louis-Marie: 1799 to 1869, physician
Poisson;Poisson, SimΘon-Denis: 1781 to 1840, mathematician and physicist
Polsunov;Polsunov, Ivan Ivanovich: c. 1728 to 1766, engineer and machine manufacturer
Poncelet;Poncelet, Jean-Victor: 1788 to 1867, engineer, mathematician and physicist
Popov;Popov, Aleksandr Stepanovich: 1859 to 1906, physicist
Porta;Porta, Giambattista della: 1538 to 1615, naturalist
Porter;Porter, Charles: 1826 to 1910, engineer
Poulsen;Poulsen, Valdemar: 1869 to 1942, physicist and radio frequency engineer
Powell;Powell, Cecil Frank: 1903 to 1969, physicist
Power takeoff;A power takeoff is an important technical fitting on tractors.
Power transmission;This is a mechanism or means of transferring power.
Prandtl;Prandtl, Ludwig: 1875 to 1953, physicist
Preece;Preece, Sir William Henry: 1834 to 1914, engineer
Pregel;Pregel, Fritz: 1869 to 1930, chemist
Pre-heater;Pre-heaters are installed in diesel engines. The air in the combustion chamber is heated before a glow plug starts the engine.
Pressure;Pressure: measurement of the force exerted on a surface.
Priestley;Priestley, Joseph: 1733 to 1804, naturalist
Prism;A prism is a usually wedge-shaped object made from light-refracting material such as glass or crystal.
Probe;An instrument used for measuring and testing in places that are not easily accessible.
Probes;A space probe is an unmanned aircraft or spacecraft for scientific research in the outer atmosphere or in space.
Prokhorov;Prokhorov, Aleksander Mikhailovich (* 1916), Russian physicist, Nobel prize winner for physics 1964 (along with Charles Hard Townes)
Prony;Prony, Gaspard-Clair-Franτois-Riche Baron de: 1755 to 1839, engineer and physicist
Propeller;A propeller is an essential part of an aircraft with at least two long blades usually made of metal. They rotate fast enough to propel an aircraft.
Proton;High-mass elementary particle with a positive charge that occurs in all atomic nuclei.
Proust;Proust, Joseph-Louis: 1754 to 1826, chemist
Ptolemy;Ptolemy (full name Claudius Ptolemaeus): c. 90 AD to 160 AD, astronomer
