The Copernican and Scientific Revolutions

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The Christian Church taught that the earth was sinful and immobile (not moving), sitting at the centre of the universe. Everything else went round it.
Scientists attacked this idea from a new angle. Humanists had already questioned the "man as sinner" view. Scientists now questioned the physical picture that went with it.
If the earth was just one moving planet, then it was not a special sinful rock at the centre. The religious story lost its physical base.

Nicolaus Copernicus was a devout Christian and a contemporary of Martin Luther.
His claim: the planets, including the earth, rotate around the sun. This is called the heliocentric (sun-centred) idea.
He was afraid of traditionalist clergymen, so he did not publish his book during most of his life.
The book is De revolutionibus (full Latin title De revolutionibus orbium coelestium libri VI, "Six Books on the Revolutions of the Heavenly Spheres"). It put the sun at the centre and made the earth one of the planets [2].
On his deathbed he handed the manuscript to his follower Joachim Rheticus.
Extra detail: Copernicus first worked out the idea roughly between 1508 and 1514 and wrote a short hand-written sketch called the Commentariolus ("Little Commentary") [3].
Rheticus was a Lutheran from the University of Wittenberg. He stayed with Copernicus at Frauenburg for about two and a half years (1539–1542) [3].
The first printed summary of the sun-centred idea came out as the Narratio prima ("First Narration", 1540 and 1541) — published under Rheticus's name, not Copernicus's, as a kind of test balloon [3].
The full book appeared in print in 1543, the year Copernicus died [3].
A 1543 copy of De revolutionibus is held in the Rare Book collection of the Library of Congress, Washington [2].

Acceptance took more than half a century. One book did not change minds overnight.
Johannes Kepler (1571–1630) — wrote the Cosmographical Mystery. His key correction: planets go round the sun in ellipses (stretched ovals), not perfect circles.
This mattered because the old astronomy insisted the heavens must be perfect, and a circle was seen as the perfect shape.
Galileo Galilei (1564–1642) — wrote The Motion, showing a dynamic world (a world of things in motion, not a fixed world).
He also used the telescope: his 1610 treatise was the first scientific work based on telescope observations, and he reported moons going round another planet plus hundreds of stars the naked eye cannot see [4].
Moons orbiting another planet were strong proof that not everything circles the earth.
Galileo's line on science and religion: the Bible "that lights the road to heaven does not say much on how the heavens work".
Meaning: scripture teaches how to live, not how the sky works. Two separate questions.

The revolution climaxed in Isaac Newton's theory of gravitation, in Principia Mathematica (1687).
Newton's Philosophiae Naturalis Principia Mathematica (1687) solved the main problems of the Scientific Revolution in mechanics (the study of motion and force) and cosmology (the study of the universe) [5].
He gave a physical reason for Kepler's laws: a gravitational pull that gets weaker with the square of the distance between the centres of two bodies. From this he could re-derive Kepler's laws [5].
He joined heavenly physics and earthly physics under one set of laws — the same rule moves an apple and a planet. Planetary theory became a branch of physics for the first time [5].

The new approach split knowledge from belief.
Belief rests on scripture and authority.
Knowledge rests on observation (careful watching) and experiment (a planned test).
This method spread out of astronomy into physics, chemistry and biology. The whole shift is called the Scientific Revolution.
Effect on ideas about God:
Among sceptics (people who doubt), God began to be replaced by Nature as the source of creation.
Even believers changed their picture: they spoke of a distant God who does not interfere in the daily running of the world.

Science stopped being a private hobby. It became public.
Royal Society, London — 1662.
Paris Academy — 1670 (the NCERT timeline also pegs 1673).
Both held lectures and public experiments. Ordinary educated people could watch science being done.
Other timeline pegs from the same period:
1569 — Mercator's cylindrical map (a flat world map that sailors could draw a straight course on).
1582 — Gregorian calendar, issued by Pope Gregory XIII. Note the irony: the Church itself used the new astronomy to fix the calendar.
1628 — William Harvey links the heart to the circulation of blood.

Copernicus (1473–1543) was a contemporary of Luther and a devout Christian.
Copernicus gave the manuscript of De revolutionibus to Joachim Rheticus on his deathbed; it was printed in 1543 [3].
Copernicus's early hand-written sketch of the idea was the Commentariolus, written about 1508–1514 [3].
The first printed account of the heliocentric idea was the Narratio prima (1540/1541), under Rheticus's name [3].
Kepler (1571–1630) — Cosmographical Mystery — planets move in ellipses, not circles.
Galileo Galilei (1564–1642) — The Motion; his 1610 work was the first science book based on telescope observations [4].
Newton's Principia Mathematica, 1687 — theory of gravitation; climax of the Scientific Revolution.
Royal Society, London — 1662; Paris Academy — 1670 (timeline 1673).
Gregorian calendar — 1582 — Pope Gregory XIII.
William Harvey — 1628 — heart and blood circulation. Mercator's cylindrical map — 1569.

Science attacked theology indirectly, not head-on. Copernicus was a devout Christian, yet moving the earth off the centre removed the physical base of the "sinful earth at the centre" idea. Use this to show that intellectual change in Europe came from inside Christian society, not from outsiders.
Humanism and science were one movement, not two. Both put the human observer at the centre of judgement — humanists read original texts for themselves, scientists read nature for themselves. Both refused to accept authority without checking.
Knowledge separated from belief is the long-term result. Galileo's line — the Bible lights the road to heaven but says little on how the heavens work — marks the start of a secular method. This later feeds the Enlightenment and the modern idea that science and religion answer different questions.
Institutions made science permanent. Without the Royal Society (1662) and the Paris Academy (1670), discoveries stay private. Public lectures and experiments created a community that checked and repeated results — the point at which science became self-correcting and cumulative.