米開朗基羅死當年生於 Pisa，牛頓出生那年死於 Arcetri。19 歲在大教堂望吊燈悟單擺等時、25 歲在斜塔丟鐵球 (傳說)、改進荷蘭望遠鏡看見木星四衛星、月球山谷、金星位相、太陽黑子——把 Aristotle 的天文徹底打碎。1633 跪地放棄日心說、傳說起身喃喃「但它仍在動」、終身軟禁、晚年全盲偷送荷蘭出版《兩種新科學》奠定牛頓力學。教廷 359 年後 (1992) 才正式平反。中指被偷藏 200 年、現在博物館指向天空。
Born in Pisa the year Michelangelo died, dying at Arcetri the year Newton was born. At 19 watching a cathedral lamp swing he discovered pendulum isochronism; at 25 the legendary balls from the Leaning Tower; improving the Dutch telescope he saw Jupiter's moons, the Moon's mountains, the phases of Venus, sunspots — shattering Aristotelian cosmology. In 1633 he knelt and abjured heliocentrism; legend says rising he muttered "And yet it moves." Permanent house arrest. Blind in old age, he smuggled the Two New Sciences to Holland — founding Newtonian mechanics. The Church rehabilitated him 359 years later (1992). His middle finger, hidden as a relic for two centuries, today points at the sky in the Florence museum.
在互動時間軸上瀏覽 → Open in interactive timeline →2 月 15 日出生 Pisa。父親 Vincenzo Galilei 是知名作曲家與音樂理論家、實驗派音樂學者——對伽利略後來實驗精神有深遠影響。家境清寒、長子。
Born February 15 in Pisa. His father Vincenzo Galilei was a renowned composer and music theorist who experimented with vibrating strings — instilling in young Galileo an experimental cast of mind. The family was poor; he was the eldest son.
米開朗基羅死當年生於 Pisa，牛頓出生那年死於 Arcetri。改進望遠鏡發現木星衛星、月球山谷、金星位相、太陽黑子——徹底破壞 Aristotle 與 Ptolemy 的天文學。1633 因捍衛日心說受教廷審判、跪地放棄、終身軟禁。失明後仍偷送荷蘭出版《兩種新科學》奠定力學。1992 教宗若望保祿二世正式平反。被愛因斯坦稱為「現代科學之父」。
Born in Pisa the year Michelangelo died, died at Arcetri the year Newton was born. Improving the telescope, he discovered Jupiter's moons, mountains on the Moon, the phases of Venus, sunspots — overturning the astronomy of Aristotle and Ptolemy. In 1633 the Inquisition tried him for defending heliocentrism; he knelt to recant and was placed under permanent house arrest. Blind in his last years, he still smuggled the Two New Sciences out to Holland — founding modern mechanics. Officially rehabilitated by Pope John Paul II in 1992. Einstein called him "the father of modern science."
19 歲在 Pisa 大教堂望禮拜、見青銅吊燈被神父推動後左右擺動。他用自己的脈搏計時，發現無論擺幅大小、週期相同——「單擺等時性」(isochronism)。後來他設計脈搏計、再構思鐘擺鐘 (但生前未實作)。
At 19, attending Mass in the Pisa Cathedral, he watched a bronze lamp swing after a priest had pushed it. Timing the swings against his own pulse, he realized the period stayed constant regardless of amplitude — the isochronism of the pendulum. He later designed a pulsometer and conceived the pendulum clock (though never built one in his lifetime).
傳說 Pisa 大學數學教授伽利略 (25 歲) 從 Pisa 斜塔同時拋下不同重量的鐵球、證明重物並非如 Aristotle 所言落得快——而是同時落地。實際上學生 Vincenzo Viviani 1654 才寫下這個故事，當時無記載證實。但伽利略確實在 Padua 時期用斜面實驗精確測量加速度。
Legend says that as a 25-year-old mathematics professor at the University of Pisa, Galileo dropped balls of different weight from the Leaning Tower, proving that — contrary to Aristotle — heavy and light objects fall at the same rate. The story comes from his student Vincenzo Viviani's biography (1654); no contemporary record confirms it. But Galileo did precisely measure acceleration using inclined planes in his Padua years.
離開 Pisa 後赴 Padua 大學任數學教授 18 年——他自稱「人生最幸福的時光」。Padua 屬威尼斯共和國，遠離教廷干預。研究運動、建造軍事羅盤、給 Galileo 名字後綴「Florentine」(有傲意)、與情婦 Marina Gamba 同居生 3 子女 (兩女送修道院，子留身邊)。
After leaving Pisa, he became professor of mathematics at Padua for 18 years — he later called these his "happiest years." Padua was in the Venetian Republic, far from papal interference. He studied motion, built military compasses, signed his name "Galileo Galilei Fiorentino" (with patriotic pride), and lived with his mistress Marina Gamba — three children (two daughters sent to a convent, the son kept).
1608 荷蘭眼鏡商 Hans Lippershey 申請望遠鏡專利。伽利略 1609 聽說後一夜內自製改良版——焦距更長、放大率從 3x 進步到 30x。先賣給威尼斯議會 (用於船隻偵察賺薪)，再轉用觀天。從此一年內所有著名天文發現如連珠炮接連問世。
In 1608 the Dutch spectacle-maker Hans Lippershey patented the telescope. Hearing of it in 1609, Galileo built an improved version overnight — longer focal length, magnification leaping from 3× to 30×. He first sold it to the Venetian Senate for spotting ships at sea (and a salary boost), then turned it to the heavens. Within a year, his cascade of famous astronomical discoveries began.
伽利略改良望遠鏡並指向天空，發現木星衛星、金星相位，以實驗方法捍衛哥白尼日心說，奠定近代科學基礎。
Galileo improves the telescope and turns it skyward; discovers Jupiter's moons and Venus phases; defends heliocentrism with experiment, founding modern science.
1609-1619 Kepler 依 Brahe 觀測資料導出行星橢圓軌道、面積速度、週期定律；為 Newton 萬有引力舖路。
From 1609-1619, Kepler derived the three laws of planetary motion from Brahe's data—ellipses, equal areas, harmonic law—paving way for Newton.
1 月 Galileo 用自製望遠鏡發現木星 4 衛星、月球山脈、金星相位、銀河數百萬星體，3 月出版《Sidereus Nuncius》(星際信使)。實證日心說，撼動亞里斯多德宇宙觀。
In January, Galileo used his telescope to discover Jupiter's four moons, lunar mountains, Venus phases, and millions of Milky Way stars. In March he published 'Sidereus Nuncius' (Starry Messenger), empirically supporting heliocentrism and shaking the Aristotelian cosmos.
用望遠鏡觀月，畫出第一幅月面圖。發現月面有山谷、火山口、平原——不是 Aristotle 所說的完美光滑天體。據此推論月與地球本質相同。是天空與地面物質可能一致的第一個觀測證據——動搖了 2000 年的 Aristotle 宇宙觀。
Through the telescope he observed the Moon and drew the first detailed lunar maps. He saw mountains, craters, and plains — not the perfect smooth sphere of Aristotelian cosmology. He inferred that the Moon was made of the same kind of matter as Earth — the first observational evidence that heaven and earth might share one physics. The 2,000-year-old Aristotelian cosmos began to crack.
1 月 7-13 日連續七夜觀木星，注意有四顆「小星」位置變化——確認是繞木星公轉的衛星 (今 Io、Europa、Ganymede、Callisto)。這是史上首次發現繞地球以外天體公轉的衛星——直接證明「萬物皆繞地球轉」是錯的。為討好 Cosimo II Medici，命名「Medicean Stars (Medici 之星)」。
Over seven consecutive nights from January 7 to 13, he observed Jupiter and noticed four "little stars" changing position — and confirmed they were satellites orbiting Jupiter (today Io, Europa, Ganymede, and Callisto). The first discovery in history of moons orbiting another body — direct proof that not everything orbits Earth. To curry favor with Cosimo II de' Medici, he named them "the Medicean Stars."
1610/3/13 Galileo 出版《星際信使》，公開望遠鏡發現木星 4 衛星、月球山脈、金星相位，驗證 Copernicus 體系。
On Mar 13, 1610, Galileo published Sidereus Nuncius revealing Jupiter's 4 moons, lunar mountains, and Venus phases—empirical support for Copernicus.
3 月《Sidereus Nuncius (星際信使)》在威尼斯出版——60 頁拉丁文小冊子、含月面圖、木星衛星觀測。一夜在歐洲風行——Pope Paul V、Henri IV、Kepler、開普勒皆來信祝賀。Cosimo II Medici 立刻召他回 Tuscany 任宮廷數學家——薪水翻倍、不必教學。
In March, Sidereus Nuncius ("Starry Messenger") was published in Venice — a 60-page Latin pamphlet with moon maps and Jupiter observations. Overnight it swept Europe; congratulations poured in from Pope Paul V, Henri IV, Kepler. Cosimo II de' Medici immediately recalled him to Tuscany as court mathematician — double pay, no teaching duties.
年底發現金星像月亮一樣有「位相」(從新月到滿月)——這只能在金星繞太陽公轉、在地球與太陽之間時才會出現。Ptolemy 體系 (金星永遠在地球與太陽之間) 預測金星只能呈月牙形——觀測徹底反證。是日心說最強的天文證據。
Late in the year he discovered that Venus, like the Moon, has phases — from crescent through full. This could only happen if Venus orbited the Sun and passed both between and beyond it from Earth. Ptolemy's system (Venus always between Earth and Sun) predicted only crescent shapes — the observation refuted it absolutely. The strongest astronomical evidence yet for heliocentrism.
用「投影法」(camera obscura) 觀太陽 (避免燒眼)。連續記錄黑子位置變化，發現太陽自轉週期 25-30 天。再次違背 Aristotle「天體完美無瑕」教義。與耶穌會學者 Christoph Scheiner 為「誰先發現」爭論——播下日後教廷敵意的種子。
Using projection (camera obscura) to view the Sun safely, he tracked sunspots and determined the Sun rotates with a period of 25-30 days. Once again contradicting Aristotelian doctrine that celestial bodies are perfect and immutable. He fought with the Jesuit astronomer Christoph Scheiner over priority of discovery — sowing seeds of his later trouble with the Church.
耶穌會與 Dominican 修士向教廷舉發伽利略「異端」。Pope Paul V 命 Cardinal Bellarmine 召見伽利略：哥白尼日心說可作為「假設」討論、但不可宣稱為「物理事實」。伽利略形式上同意。同時哥白尼《天體運行論》被列禁書 (直到 1835)。
Jesuits and Dominicans denounced Galileo to the Inquisition for heresy. Pope Paul V sent Cardinal Bellarmine to interview Galileo: heliocentrism could be discussed as a hypothesis, but not asserted as physical fact. Galileo formally agreed. Copernicus's De revolutionibus was placed on the Index of Forbidden Books — where it stayed until 1835.
歷時 6 年完成義大利文《Dialogue》——三人對話：Salviati (日心說)、Sagredo (中立)、Simplicio (地心說笨蛋)。明顯偏袒日心說。新 Pope Urban VIII (原本伽利略朋友) 大怒——他懷疑 Simplicio 影射自己。教廷召伽利略到羅馬受審。
After six years he published the Italian-language Dialogue — three voices: Salviati (heliocentrist), Sagredo (neutral), and Simplicio (geocentrist fool). The bias was obvious. The new Pope Urban VIII — once Galileo's friend — was furious, suspecting that Simplicio caricatured him. He summoned Galileo to Rome for trial.
6 月 22 日羅馬宗教裁判所判 Galileo 異端，被迫公開放棄日心說(傳說中喃喃「Eppur si muove」「但它還是動的」)，餘生軟禁。1992 年教宗 John Paul 二世正式為 Galileo 平反。
On June 22, the Roman Inquisition convicted Galileo of heresy, forcing him to publicly recant heliocentrism (legend has him muttering 'Eppur si muove' — 'And yet it moves'). He spent his final years under house arrest. Pope John Paul II formally rehabilitated him in 1992.
4 月起在羅馬宗教裁判所受 4 次審訊。伽利略 70 歲、體弱、病。被出示 1616 警告文件。被告知如不認罪將「依加重之刑」(暗示嚴刑)。伽利略願認「過度誇大日心說論證」，但拒絕承認異端意圖。最終仍被判「強烈異端嫌疑 (vehementer suspectus de haeresi)」。
From April he faced four interrogations before the Roman Inquisition. He was 70, frail, ill. They produced the 1616 warning document. He was told that if he did not confess he would face "rigorous examination" (the implied threat of torture). He agreed to admit "overzealous argumentation for heliocentrism," but refused to admit heretical intent. The verdict: "vehemently suspect of heresy."
判決：終身監禁，Pope 改判「軟禁於 Tuscany」。伽利略住佛羅倫斯郊外 Arcetri 別墅 9 年。期間女兒 Maria Celeste (修女) 隨侍照顧、書信留 124 封 (是「Galileo's Daughter」一書主題)。Maria Celeste 1634 年早逝，伽利略「整顆心都被刺穿」。
The sentence: life imprisonment, commuted by the Pope to house arrest in Tuscany. He spent his last nine years at his villa at Arcetri outside Florence. His daughter Maria Celeste (a nun) cared for him; 124 of her letters survive (the basis of the book Galileo's Daughter). Maria Celeste died young in 1634; Galileo wrote that he was "pierced through the heart."
6 月 22 日於 Santa Maria sopra Minerva 教堂跪地、穿懺悔白衣、誦讀放棄日心說的拉丁誓詞：「我跪認、誓棄、詛咒並譴責上述的錯誤與異端」。傳說起身時喃喃自語：「Eppur si muove (但它仍在動)」——但這句話 18 世紀才出現於史書，可能是後人浪漫化加上。
On June 22, in the church of Santa Maria sopra Minerva, kneeling in a penitent's white robe, he read aloud the Latin abjuration: "I, Galileo, on my knees, abjure, curse, and detest the said errors and heresies." Legend says that as he rose he muttered "Eppur si muove" — "And yet it moves." But this phrase first appears in an 18th-century biography; it may be a romantic later embellishment.
74 歲全盲——多年無濾鏡觀太陽黑子的代價。他寫信給朋友：「我用我所有發現去拓展一千倍世人對宇宙的眼界，現在我自己已縮成只剩自身那麼大的世界，永遠暗下去。」
At 74 he went totally blind — the cost of years of filterless observation of sunspots. He wrote to a friend: "This universe, which I expanded a thousand times by my discoveries, is now shrunk into my own person, and grows dark forever."
晚年 (失明後) 完成《Discourses on Two New Sciences》。內容是力學基礎——慣性、自由落體、拋物線、材料強度。教廷禁書，伽利略偷將手稿經外交郵袋送到新教荷蘭 Leiden 出版。這本書是牛頓力學的直接前驅——50 年後牛頓 1687 年的《Principia》直接立基於此。
In his blind old age he completed the Discourses on Two New Sciences — the foundations of mechanics: inertia, free fall, projectile motion, the strength of materials. Forbidden in Catholic lands, Galileo smuggled the manuscript via diplomatic pouch to Protestant Holland, published at Leiden. This book was the direct precursor to Newtonian mechanics — Newton's Principia of 1687 built directly on it.
1 月 8 日死於 Arcetri 別墅，77 歲。同年 12 月 25 日 Isaac Newton 在英國出生——科學史上「火炬交接」的傳奇巧合。Pope Urban VIII 拒絕讓伽利略葬聖十字大教堂主殿。1737 年才被遷入主殿，與米開朗基羅、Machiavelli 並列。
Died January 8 at the Arcetri villa, age 77. On December 25 the same year Isaac Newton was born in England — the legendary "passing of the torch." Pope Urban VIII refused him burial in the main hall of Santa Croce in Florence; only in 1737 were his bones moved there, beside Michelangelo and Machiavelli.
1737 遷葬聖十字教堂時，崇拜者割下伽利略右手中指作為「世俗聖物」(對應教廷迫害的反諷)。中指輾轉藏 200 多年，現在佛羅倫斯伽利略博物館——指向天空，象徵「我朝向真理」。
During the 1737 reburial at Santa Croce, an admirer cut off Galileo's right middle finger as a secular relic (a pointed counter to the Church's persecution). The finger was hidden for over 200 years; today it stands in the Museo Galileo in Florence — pointing toward the sky, a wordless gesture of "I pointed at truth."
1979 教宗若望保祿二世下令重審伽利略案。歷時 13 年研究，1992.10.31 教宗在梵蒂岡正式承認：當年神學家用聖經解讀科學是錯誤、伽利略受苦冤枉。距離他放棄日心說的 1633 年已過 359 年。歷史諷刺：那時人類已登月、伽利略「Medicean Stars」(木星衛星) 已被太空船 Voyager 拍照。
In 1979 Pope John Paul II ordered a reexamination of the Galileo case. After 13 years of study, on October 31, 1992, the Pope formally acknowledged at the Vatican that the theologians of 1633 had erred in using scripture to interpret science; Galileo had suffered unjustly. 359 years after his abjuration. By then humans had walked on the Moon, and his "Medicean Stars" had been photographed up close by Voyager.