500 BCE
Zeno's Paradoxes
Zeno of Elea proposes paradoxes challenging the concepts of motion and plurality, influencing later ideas about space and time. #philosophy #physics
Chronological Storyline (42 Milestones)
400 BCE
Mozi Describes Camera Obscura
Mozi (Micius) writes on optics, including the first recorded description of the camera obscura, reflecting early Chinese investigation of light. #optics #China
By Vjacheslav Rublevskiy - https://www.flickr.com/photos/193162016@N04/51221161306/, CC0, https://commons.wikimedia.org/w/index.php?curid=106219380
350 BCE
Aristotle's Physics
Aristotle's treatise 'Physics' establishes foundational ideas about motion, place, and time, dominating Western thought for centuries. #philosophy #physics )
By Unknown author - http://grid.ceth.rutgers.edu/ancient/greek/aristotle_greek/, Public domain, https://commons.wikimedia.org/w/index.php?curid=269934
300 BCE
Euclid's Optics
Euclid's 'Optics' treats vision geometry and the rectilinear propagation of light, influencing later optical theories. #optics #mathematics
By Jusepe de Ribera (Spanish / Italian, 1591 - 1652) (1591 - 1652) – artist (Spanish / Italian) Details on Google Art Project - wAGVeSb2M1HfDA at Google Cultural Institute maximum zoom level, Public domain, https://commons.wikimedia.org/w/index.php?curid=21993409
150 BCE
Hipparchus's Star Catalog
Hipparchus compiles a star catalog using a coordinate system, advancing astronomical measurement and early concepts of reference frames. #astronomy #science
By William Henry Smyth - George F. Chambers, A Handbook of Descriptive and Practical Astronomy, Vol. 3 (4th ed.) https://archive.org/details/handbookofdescri0003geor/page/n10/mode/1up, Public domain, https://commons.wikimedia.org/w/index.php?curid=134619278
78 CE
Zhang Heng's Celestial Model
Chinese polymath Zhang Heng develops a water-powered armillary sphere, improving understanding of celestial motions. #astronomy #China
By Windmemories - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=176246974
150 CE
Ptolemy's Almagest
Claudius Ptolemy's 'Almagest' synthesizes ancient astronomy, presenting a geocentric model with epicycles that dominated for over a millennium. #astronomy #science
By Ptolemy - http://www.univie.ac.at/hwastro/rare/1515_ptolemae.htm, Public domain, https://commons.wikimedia.org/w/index.php?curid=29985717
500 CE
Aryabhata's Earth Rotation
Indian astronomer Aryabhata proposes that Earth rotates on its axis daily, an early heliocentric concept. #astronomy #India
By Cpjha13 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=49883192
600 CE
Brahmagupta on Gravity
Indian mathematician Brahmagupta states that objects fall toward Earth due to a property of attraction, an early notion of gravity. #science #India
800 CE
Banū Mūsā's Book of Tricks
The Banū Mūsā brothers write 'Book of Tricks', describing ingenious mechanical devices and early concepts of motion and automation. #engineering #Islam
By Unknown author - Book of of Ahmad ibn Musa ibn Shakir, Public domain, https://commons.wikimedia.org/w/index.php?curid=14730630
1000 CE
Alhazen's Book of Optics
Ibn al-Haytham (Alhazen) publishes 'Book of Optics', detailing experiments on light, reflection, and refraction, and rejecting the emission theory. #optics #Islam
By Ibn al-Haytham, Vitello, Friedrich Risner - University of Oklahoma History of Science Collections et BnF Gallica : http://gallica.bnf.fr/ark:/12148/bpt6k312873d.r=Haytham?rk=407727;2, Public domain, https://commons.wikimedia.org/w/index.php?curid=48189707
1025 CE
Avicenna on Motion
Avicenna's 'The Book of Healing' includes theories on motion, force, and the relativity of motion, anticipating later impetus theory. #physics #Islam
1030 CE
Al-Biruni's Earth Rotation
Al-Biruni discusses the possibility of Earth's axial rotation in his astronomical works, reflecting Islamic scientific inquiry. #astronomy #Islam
By The original uploader was Romanm at Slovenian Wikipedia. - Originally from sl.wikipedia; description page is/was here., Public domain, https://commons.wikimedia.org/w/index.php?curid=2590841
1088 CE
Shen Kuo's Dream Pool Essays
Chinese scientist Shen Kuo writes 'Dream Pool Essays', describing magnetic compass, astronomical instruments, and theories of celestial motion. #science #China
By Unknown 18th century artist - http://www-history.mcs.st-andrews.ac.uk/PictDisplay/Shen_Kua.html, Public domain, https://commons.wikimedia.org/w/index.php?curid=6551589
1140 CE
Ibn Bajjah on Impetus
Ibn Bajjah (Avempace) develops an early theory of impetus, anticipating later medieval European concepts of motion. #physics #Islam
1320 CE
Buridan's Impetus Theory
Jean Buridan formulates the theory of impetus, a precursor to inertia, explaining projectile motion without Aristotelian prime movers. #physics #medieval
By Unknown author - Walther Hermann Ryff: Bawkunst Oder Architectur aller fürnemsten/ Nothwendigsten/ angehœrigen Mathematischen vnd Mechanischen Kuensten. Basel 1582, p. ccxv, Public domain, https://commons.wikimedia.org/w/index.php?curid=17900666
1370 CE
Oresme's Graphical Analysis
Nicole Oresme introduces graphical representation of motion with latitude of forms, a precursor to coordinate geometry. #mathematics #science
By Nicole Oresme / Aristotle - Nicole Oresme (1400-1420) Traité de la sphère; Aristote, De caelo et de mundo, traduction française par Nicole Oresme, p. 1r OCLC: 1177977521., Public domain, https://commons.wikimedia.org/w/index.php?curid=436922
1490 CE
Da Vinci's Motion Studies
Leonardo da Vinci conducts detailed studies of motion, including sketches of falling bodies and projectile trajectories. #art #science
By Attributed to Francesco Melzi - File:Francesco_Molzi_-_Portrait_of_Leonardo_-_WGA14795.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=78645105
1543 CE
Copernicus's Heliocentric Model
Nicolaus Copernicus publishes 'De revolutionibus', placing the Sun at the center, revolutionizing astronomy. #astronomy #science
By derivative work of Johannes Petreius 1543 edition of File:Nicolai_Copernici_torinensis_De_revolutionibus_orbium_coelestium.djvu - File:Nicolai_Copernici_torinensis_De_revolutionibus_orbium_coelestium.djvu, Public domain, https://commons.wikimedia.org/w/index.php?curid=5611684
1600 CE
Gilbert's De Magnete
William Gilbert publishes 'De Magnete', describing Earth's magnetic field and early experiments in electricity. #physics #science
By Unknown author - Image from Timeline of the First Thirty Years of Radio (image is not eligible for copyright), with small alterations by User:Omegatron, Public domain, https://commons.wikimedia.org/w/index.php?curid=2422400
1609 CE
Galileo's Telescope and Relativity
Galileo Galilei improves the telescope, observes celestial bodies, and formulates the principle of relativity for uniform motion. #astronomy #physics
By Justus Sustermans - http://collections.rmg.co.uk/collections/objects/14174, Public domain, https://commons.wikimedia.org/w/index.php?curid=62614082
1610 CE
Galileo's Sidereus Nuncius
Galileo publishes 'Sidereus Nuncius', announcing his telescopic discoveries, including Jupiter's moons, supporting heliocentrism. #astronomy #science
By Galileo Galilei - Houghton Library, Public domain, https://commons.wikimedia.org/w/index.php?curid=35420870
1666 CE
Newton's Annus Mirabilis
Isaac Newton develops the laws of motion, universal gravitation, and calculus, laying foundations for classical physics. #physics #science
1676 CE
Rømer Measures Light Speed
Ole Rømer uses observations of Jupiter's moon Io to estimate the finite speed of light, a crucial step. #astronomy #physics
By Jacob Coning - Farvereproduktioner efter 20 portrætter af berømte danske mænd (København 1943), Public domain, https://commons.wikimedia.org/w/index.php?curid=33262775
1687 CE
Newton's Principia
Newton publishes 'Philosophiæ Naturalis Principia Mathematica', establishing laws of motion and universal gravity in absolute space and time. #physics #science
By The original uploader was Zhaladshar at English Wikisource. - Transferred from en.wikisource to Commons. (previous image from another copy) Internet Archive (current image from the Bern Dibner copy), Public domain, https://commons.wikimedia.org/w/index.php?curid=2681838
1728 CE
Bradley Discovers Aberration
James Bradley discovers stellar aberration, providing direct evidence of Earth's motion and the finite speed of light. #astronomy #physics
By BlankAxolotl - inkscape, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=46795372
1801 CE
Young's Double-Slit Experiment
Thomas Young demonstrates interference of light, supporting wave theory and leading to debates on light's nature. #physics #optics
By Original: NekoJaNekoJa Vector: Johannes Kalliauer - Own work based on: Double-slit.PNG:, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=61496401
1865 CE
Maxwell's Electromagnetic Theory
James Clerk Maxwell publishes equations unifying electricity, magnetism, and light, predicting constant light speed. #physics #science
By FF-UK - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=59542523
1887 CE
Michelson-Morley Experiment
Albert Michelson and Edward Morley conduct an experiment showing no significant aether wind, challenging the luminiferous aether. #physics #experiment
By Case Western Reserve University - http://www.cellularuniverse.org/AA2MM_Aether.htm, Public domain, https://commons.wikimedia.org/w/index.php?curid=48697725
1895 CE
Lorentz's Local Time
Hendrik Lorentz introduces the concept of 'local time' as a mathematical tool in aether theory, a precursor to relativity. #physics #science
By Unknown author - http://hdl.handle.net/10648/ad887254-d0b4-102d-bcf8-003048976d84, PDM-owner, https://commons.wikimedia.org/w/index.php?curid=144534263
1899 CE
Larmor's Time Dilation
Joseph Larmor derives the time dilation formula within Lorentz's aether theory, anticipating relativistic effects. #physics #science
By Unknown author - http://www.apprendre-math.info/history/photos/Larmor_2.jpeg // http://www.apprendre-math.info/espagnol/historyDetail.htm?id=Larmor, Public domain, https://commons.wikimedia.org/w/index.php?curid=56206809
1905 CE
Einstein's Special Relativity
Albert Einstein publishes 'On the Electrodynamics of Moving Bodies', introducing the special theory of relativity based on two postulates. #physics #relativity
By Lucien Chavan [1] (1868 - 1942), a friend of Einstein's when he was living in Berne. - Cropped from original at the The Albert Einstein Archives, The Hebrew University of Jerusalem., Public domain, https://commons.wikimedia.org/w/index.php?curid=16699199
1905 CE
Einstein's E=mc²
Einstein publishes a follow-up paper establishing mass-energy equivalence, famously E=mc². #physics #relativity
By NASA and The Hubble Heritage Team (STScI/AURA) - HubbleSite: gallery, release., Public domain, https://commons.wikimedia.org/w/index.php?curid=102873
1908 CE
Minkowski's Spacetime
Hermann Minkowski reformulates special relativity in a four-dimensional spacetime geometry, unifying space and time. #physics #mathematics
By Hermann Minkowski - scan from original book, Public domain, https://commons.wikimedia.org/w/index.php?curid=2956997
1911 CE
Langevin's Twin Paradox
Paul Langevin describes the twin paradox to illustrate time dilation in special relativity. #physics #relativity
By Robert Markowitz - https://www.flickr.com/photos/nasa2explore/16335632852/, Public domain, https://commons.wikimedia.org/w/index.php?curid=37967329
1938 CE
Ives-Stilwell Experiment
The Ives-Stilwell experiment provides early confirmation of time dilation using Doppler shifts in canal rays. #physics #experiment
By Prokaryotic Caspase Homolog - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=134901330
1949 CE
Poincaré and Relativity
Henri Poincaré's earlier contributions to relativity are acknowledged; he had recognized the principle of relativity and Lorentz transformations. #physics #science
By Unknown author - Popular Science Monthly Volume 82, Public domain, https://commons.wikimedia.org/w/index.php?curid=20644432
1971 CE
Hafele-Keating Experiment
J.C. Hafele and Richard Keating fly atomic clocks around the world, directly measuring time dilation effects from special and general relativity. #physics #experiment
By Binarysequence - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=24592511
1990 CE
GPS Relativity Corrections
Global Positioning System satellites incorporate corrections for both special and general relativistic time dilation, providing practical validation. #physics #technology
By U.S. Air Force - Original source: http://www.losangeles.af.mil/shared/media/ggallery/hires/AFG-100825-006.jpg See also: https://www.af.mil/News/Photos.aspx?igphoto=2001638810 Full resolution: https://www.gps.gov/multimedia/images/GPS-III-A.jpg, Public domain, https://commons.wikimedia.org/w/index.php?curid=20220437
2007 CE
Faster-than-Light Neutrino Anomaly
The OPERA experiment initially reports faster-than-light neutrinos, later traced to a measurement error, reinforcing special relativity. #physics #experiment
2015 CE
LIGO Detects Gravitational Waves
LIGO observes gravitational waves, confirming a prediction of general relativity that also tests spacetime concepts. #physics #astronomy
By Amber Stuver - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=46993713
2017 CE
Muon g-2 Experiment
The Muon g-2 experiment at Fermilab precisely tests special relativistic time dilation and quantum effects. #physics #experiment
By Reidar Hahn - https://vms.fnal.gov/asset/detail?recid=1950114, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=58326280