physical science: Media
Videos
Discussion of four attempts to explain the structure of the solar system, from Aristotle...
Video: Encyclopædia Britannica, Inc.
Kepler's theory of the solar system.
Video: Encyclopædia Britannica, Inc.
Explanation of gravitational force.
Video: Encyclopædia Britannica, Inc.
Learn about Thomas Young's double-slit experiment that challenged Isaac Newton's...
Video: Contunico © ZDF Studios GmbH, Mainz
John Dalton and the development of the atomic theory.
Video: Encyclopædia Britannica, Inc.
History of the big-bang model.
Video: Encyclopædia Britannica, Inc.
A brief lesson on the gravitational effects of dark matter.
Video: © MinutePhysics (A Britannica Publishing Partner)
Learn how the Sun uses nuclear fusion.
Video: © MinutePhysics (A Britannica Publishing Partner)
Description of Albert Einstein's theory of relativity as a theory about what is absolute...
Video: © MinutePhysics (A Britannica Publishing Partner)
Explanation of the photoelectric effect.
Video: Encyclopædia Britannica, Inc.
Description of Albert Einstein's theory of Brownian motion and how he derived the...
Video: © MinutePhysics (A Britannica Publishing Partner)
A lesson on how small things, like electrons and protons, can behave like both a...
Video: © MinutePhysics (A Britannica Publishing Partner)
Images
The Compact Muon Solenoid magnet arriving in the Large Hadron Collider at CERN, 2007.
© 2007 CERN
Effects of precession on Earth's axis of rotation.
Encyclopædia Britannica, Inc.
In Ptolemy's geocentric model of the universe, the Sun, the Moon, and each planet...
Encyclopædia Britannica, Inc.
Epicurus, bronze bust from a Greek original, c. 280–270 bce;...
Courtesy of the Soprintendenza alle Antichita della Campania, Naples
Archimedes' principle of buoyancy. Here a 5-kg object immersed in water is shown...
Encyclopædia Britannica, Inc.
Engraving from Christoph Hartknoch's book Alt- und neues Preussen (1684;...
Courtesy of the Joseph Regenstein Library, The University of Chicago
Engraving of the solar system from Nicolaus Copernicus's De revolutionibus orbium...
The Adler Planetarium and Astronomy Museum, Chicago, Illinois
Engraving of Tycho Brahe at the mural quadrant, from his book Astronomiae instauratae...
Courtesy of the Joseph Regenstein Library, University of Chicago
Engraving of Tycho Brahe's model of the motion of the planet Saturn, from his Astronomiae...
The Adler Planetarium and Astronomy Museum, Chicago
Johannes Kepler, oil painting by an unknown artist, 1627; in the cathedral of Strasbourg,...
Erich Lessing/Art Resource, New York
Two of Galileo's first telescopes; in the Museo Galileo, Florence.
Scala/Art Resource, New York
Galileo's illustrations of the Moon, from his Sidereus Nuncius (1610; The...
Courtesy of the Joseph Regenstein Library, The University of Chicago
Galileo, oil painting by Justus Sustermans, c. 1637, in the Uffizi Gallery, Florence.
SCALA/Art Resource, New York
Christiaan Huygens, portrait by Caspar Netscher, 1671; in the Collection Haags Gemeentemuseum,...
Courtesy of the Collection Haags Gemeentemuseum, The Hague
Title page from Isaac Newton's Philosophiae Naturalis Principia Mathematica...
Courtesy of the Joseph Regenstein Library, The University of Chicago
In the reflection of light, the angle of incidence is equal to the angle of reflection,...
Encyclopædia Britannica, Inc.
Isaac Newton's prism experiment, 1666.
Encyclopædia Britannica, Inc.
Illustration depicting the phenomenon of Newton's rings.
Charles D. Reilly/Encyclopædia Britannica, Inc.
Portrait presumed to be of Paracelsus by Quinten Massys; in the Louvre, Paris.
© Photos.com/Jupiterimages
Robert Boyle, oil painting by an unknown artist after F. Kerseboom; in the National...
Courtesy of the National Portrait Gallery, London
Halley's Comet crossing the Milky Way Galaxy, as observed from the Kuiper Airborne...
Kuiper Airborne Observatory/NASA
Composite image of Uranus with its five major moons, captured by a camera aboard...
NASA/JPL
Urbain-Jean-Joseph Le Verrier.
Mary Evans Picture Library Ltd/age fotostock
In 1919 observation of a solar eclipse confirmed Einstein's prediction that light...
Encyclopædia Britannica, Inc.
Friedrich Wilhelm Bessel, engraving by E. Mandel after a painting by Franz Wolf.
The Bettmann Archive
Illustration from “On the Electricity Excited by the Mere Contact of Conducting Substances...
© Photos.com/Thinkstock
Radio waves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays...
Encyclopædia Britannica, Inc.
Hermann Boerhaave, detail of a portrait by Cornelis Troost; in the Rijksmuseum, Amsterdam.
Courtesy of the Rijksmuseum, Amsterdam
The periodic table of the elements from Dmitri Mendeleev's Osnovy khimii...
© Photos.com/Thinkstock
Henrietta Swan Leavitt.
Emilio Segrè Visual Archives, Shapley Collectionn, Physics Today Collection, Niels Bohr Library & Archives, AIP; photograph, Margaret Harwood
The Andromeda Galaxy, also known as the Andromeda Nebula or M31. It is the closest...
© Giovanni Benintende/Shutterstock.com
Matter-energy content of the universe.
Encyclopædia Britannica, Inc.
Rings and jets around the central pulsar in the Crab Nebula, as seen by the Chandra...
NASA/MSFC
Hubble Space Telescope image of an 800-light-year-wide spiral-shaped disk of dust...
L. Ferrarese (Johns Hopkins University) and the National Aeronautics and Space Administration
An artist's conception depicts Kepler-186f, the first Earth-sized extrasolar planet...
Ames/SETI Institute/JPL-Caltech/NASA
Marie Curie (far right) and her daughter Irène (second from right) posing with their...
© Photos.com/Jupiterimages
A diagram represents the nuclei of three oxygen isotopes. Each nucleus has eight...
Encyclopædia Britannica, Inc.
Physicist Ernest Rutherford envisioned the atom as a miniature solar system, with...
Encyclopædia Britannica, Inc.
Sequence of events in the fission of a uranium nucleus by a neutron.
Encyclopædia Britannica, Inc.
As an object approaches the speed of light, an observer sees the object become shorter...
Encyclopædia Britannica, Inc.
Bohr atomic model of a nitrogen atom. The central nucleus contains the protons and...
Encyclopædia Britannica, Inc.
Energy levels of the hydrogen atom, according to Bohr's model and quantum mechanics...
Encyclopædia Britannica, Inc.
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