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Timeline ofstellar astronomy

• 1200 BC — Chinese star names appear onoracle bones used for divination.
• 134 BC —Hipparchus creates themagnitude scale of stellar apparentluminosities
• 185 AD —Chinese astronomers become the first to observe asupernova, theSN 185
• 964 —Abd al-Rahman al-Sufi (Azophi) writes theBook of Fixed Stars, in which he makes the first recorded observations of theAndromeda Galaxy and theLarge Magellanic Cloud, andlists numerous stars with their positions, magnitudes, brightness, and colour, and gives drawings for eachconstellation
• 1000s (decade) — ThePersian astronomer,Al-Biruni, describes theMilky Waygalaxy as a collection of numerousnebulous stars
• 1006 —Ali ibn Ridwan and Chinese astronomers observe theSN 1006, the brightest stellar event ever recorded
• 1054 — Chinese and Arab astronomers observe theSN 1054, responsible for the creation of theCrab Nebula, the onlynebula whose creation was observed
• 1181 — Chinese astronomers observe theSN 1181 supernova
• 1580 —Taqi al-Din measures theright ascension of the stars at theConstantinople observatory of Taqi ad-Din using an "observational clock" he invented and which he described as "amechanical clock with three dials which show the hours, the minutes, and the seconds"
• 1596 —David Fabricius notices thatMira's brightness varies
• 1672 —Geminiano Montanari notices thatAlgol's brightness varies
• 1686 —Gottfried Kirch notices thatChi Cygni's brightness varies
• 1718 —Edmund Halley discovers stellarproper motions by comparing his astrometric measurements with those of the Greeks
• 1782 —John Goodricke notices that the brightness variations of Algol are periodic and proposes that it is partially eclipsed by a body moving around it
• 1784 —Edward Pigott discovers the firstCepheid variable star
• 1838 —Thomas Henderson,Friedrich Struve, andFriedrich Bessel measure stellarparallaxes
• 1844 — Friedrich Bessel explains the wobbling motions ofSirius andProcyon by suggesting that these stars have dark companions
• 1906 —Arthur Eddington begins his statistical study of stellar motions
• 1908 —Henrietta Leavitt discovers the Cepheidperiod-luminosity relation
• 1910 —Ejnar Hertzsprung andHenry Norris Russell study the relation between magnitudes andspectral types of stars
• 1924 —Arthur Eddington develops themain sequence mass-luminosity relationship
• 1929 —George Gamow proposeshydrogenfusion as the energy source for stars
• 1938 —Hans Bethe andCarl von Weizsäcker detail theproton–proton chain andCNO cycle in stars
• 1939 —Rupert Wildt realizes the importance of the negative hydrogenion for stellar opacity
• 1952 —Walter Baade distinguishes between Cepheid I and Cepheid II variable stars
• 1953 —Fred Hoyle predicts acarbon-12 resonance to allow stellartriple alpha reactions at reasonable stellar interior temperatures
• 1961 —Chūshirō Hayashi publishes his work on the Hayashi track of fully convective stars
• 1963 —Fred Hoyle andWilliam A. Fowler conceive the idea of supermassive stars
• 1964 —Subrahmanyan Chandrasekhar andRichard Feynman develop a general relativistic theory of stellar pulsations and show that supermassive stars are subject to a general relativistic instability
• 1967 —Eric Becklin andGerry Neugebauer discover theBecklin-Neugebauer Object at 10 micrometres
• 1977 — (May 25) TheStar Wars film is released and became a worldwide phenomenon, boosting interests in stellar systems.
• 2012 — (May 2) First visual proof of existence of black-holes.Suvi Gezari's team inJohns Hopkins University, using the Hawaiian telescopePan-STARRS 1, publish images of asupermassive black hole 2.7 million light-years away swallowing ared giant.^[1][2]

• Timeline of astronomy

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