Who Discovered The Earth Moves Around The Sun?

Who Discovered The Earth Moves Around The Sun?

Copernicus (1473-1543) was not the first person to claim that the Earth rotates around the Sun. In Western civilization, ancient Greek astronomer Aristarchus of Samos is generally credited with being the first person to propose a Sun-centred astronomical hypothesis of the universe (heliocentric). At that time, however, Aristarchus’s heliocentrism gained few supporters and 18 centuries would then pass before Renaissance astronomer Nicolaus Copernicus produced a fully predictive mathematical model of a heliocentric system.

ANCIENT TIMES

Yajnavalkya (9th Century BCE)

Before the Golden Age of Greece, speculation that the Sun and not the Earth lay at “the centre of the spheres” dates back at least to the time of the Indian philosopher Yajnavalkya (9th Century BCE), who was part of a Vedic Tradition which used mathematics and geometry in some religious rituals. As Yajnavalkya wrote in a sacred Hindu text (Shatapatha Brahmana: 8.7.3.10):

“The sun strings these worlds – the earth, the planets, the atmosphere – to himself on a thread.”

This is one of the first recorded references to heliocentrism, but supporters of the idea were in the minority and India continued to believe in a geocentric model until the telescope was invented in the 17th century.

Aristarchus (310BC–230 BCE)

In the days of Aristarchus our solar system was considered to be the whole of the known universe, with the Earth placed at its centre, and the rest of the planets and fixed stars revolving around the Earth daily. According to Aristarchus’ revolutionary new theory, however, it was the Sun, not the Earth, which inhabited its centre, while the Earth, and the rest of the planets orbited around the Sun in a circular motion,

Unfortunately, Aristarchus’ one work which did survive from ancient times makes no mention of his heliocentric model, and so his ideas on the subject have had to be pieced together from references by such important figures as the Greek biographer Plutarch, the Greek philosopher Sextus Empiricus, and Greek mathematician Archimedes, who wrote in his book “The Sand Reckoner”:

“His hypotheses are that the fixed stars and the Sun remain unmoved, and that the Earth revolves about the Sun in the circumference of a circle, the Sun lying in the middle of the orbit.”

Nevertheless, the concept of a heliocentric model of the solar system encountered fierce resistance from religions which saw God’s chief creation man placed at the centre of the universe, while even some of his contemporaries, such as the philosopher Cleanthes, took exception to Aristarchus for diminishing the importance of the Sun by setting it amongst the “fixed stars”, and also propounding the ideas of Anaxagoras (497–428 BC), who two centuries earlier had asserted that the Sun is a star, and not a god.

Aristarchus’ theory also seemed counter-intuitive to the senses, and the scholar Dercyllides dismissed his supposition on the Earth’s movement around the Sun as “being contrary to the theories of mathematicians.” Key to his heliocentric theory’s rejection on scientific grounds was that there appeared to be no apparent signs of any observable parallax, or shift in positions of the stars as the Earth orbited from one side of the Sun to the other. This was held up as an argument against heliocentrism throughout the ensuing centuries, but the truth is that the stars are so distant that any parallax is so small as to be unobservable. In fact, it wasn’t until 1838 that Friedrich Bessel achieved the first successful measurements of stellar parallax using a heliometer, or a refracting telescope with two lenses capable of gauging the angular separation between two stars.

Plato, Aristotle And Ptolemy

Consequently, the geocentric model of the solar system with the Earth placed at its centre proposed by such Greek philosophers as Plato (428-348 BCE), and Aristotle (384–322 BCE) became the accepted version of celestial events. In 140 AD the geocentric model was then cataloged by Ptolemy (90–168 AD) in his masterpiece entitled ‘Almagest’ which then became the established belief in the western world for the next 14 centuries.

THE RENAISSANCE

Who Discovered The Earth Moves Around The Sun?Copernicus (1473-1543)

Renaissance mathematician and astronomer Nicolaus Copernicus tried to revive Aristrachus’ heliocentric theory, and by 1532 had basically completed his manuscript entitled ‘De revolutionibus orbium coelestium’. In his seminal work, Copernicus formulated a fully predictive model of the universe in which the Earth is just another planet orbiting the Sun, but fear of being branded a heretic by the Christian Church meant that he waited until his deathbed in 1543 before publishing the book.

The Copernican Revolution which ensued is now seen as the launching point to modern astronomy, although at the time the Catholic church suspended Copernicus’ book, pending corrections, and vehemently tried to suppress all arguments relating to his heliocentric theory. Interestingly, De Revolutionibus wasn’t banned by the Church until March 5, 1616, and only after Galileo drew heavily on the book to support his own heliocentric ideas.

Galileo Galilei (1564-1642)

The next century, Galileo Galilei (1564-1642) used the newly invented refracting telescope to further expand on Copernicus’ theory, and after discovering Jupiter’s four main moons in 1610, the first satellites ever found orbitting another planet, he subsequently observed the phases of Venus, thereby showing that it was in fact the planets that orbit the Sun. In 1632, Galileo then published his book entitled ‘The Dialogue Concerning the Two Chief World Systems’ in which he compared the Copernican system with the Ptolemaic system, but was subsequently convicted on “grave suspicion of heresy”, forced to recant his beliefs, and subsequently spend the rest of his life under house arrest.

Sir Isaac Newton (1643-1727)

After Sir Isaac Newton invented the reflecting telescope in 1688, it soon became eminently clear that the Earth was not the centre of our solar system. The final nail in the coffin of geocentrism then came after Newton  published his Principia Mathematica in which he definitively proves the heliocentric model first proposed by Copernicus.

Edmund Halley (1656-1742) would later use Newton’s equations to predict the return of a comet in 1758 to give final proof to the heliocentric theory.

I will now leave you with a beautiful astronomy quote from Copernicus’ ‘De revolutionibus orbium coelestium’ published on his death-bed in 1543, which states:

“In the center of all rests the Sun. For who would place this lamp of a very beautiful temple in another or better place than this from which it can illuminate everything at the same time?”

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  • Sam

    It says here that “India continued to believe in a geocentric model”, any proof of that ?

    • http://www.astronomytrek.com/ Pete

      There’s a wealth of information about India’s belief in a geocentric model before Galileo’s use of the telescope in the 17th century. For instance, an interesting essay by the celebrated astronomer Rajesh Kochhar called ‘Indian astronomy ; A historical perspective’, states:

      “The development of mathematical, or Siddhantic, astronomy came about as a result of interaction with Greece in the Post-Alexandrian period.. The leading figure in the modernization was Aryabhata I .. [and] the main occupation of Indian astronomers for the next thousand years and more was the calculation of geocentric planetary orbits and developing algorithms for the solution of the mathematical equations that arose in the process.”

      • PENNY PINGLETON FAN PAGE

        but India still hasn’t solved the toilet paper debate or the sewage problem along the sidewalks of New Delhi lol

      • Govind Melitte

        Just to make it clear since you appear to be misunderstanding something, the geocentric model Aryabhata postulated is pretty much the exact same solar system that we know and study.
        It was merely a lot more complex because he used the Earth as the centre instead of the Sun. The planets followed different helical structures instead of the circle or oval orbit.
        Thus, it was a geocentric model yet had the correct calculations instead of the old geocentric model we know of that simply put the Earth in the centre and had everything circle it in perfect circles.

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  • jacob

    Well it probably is facts somewhere but I dont believe that they still believe the geocentric model.

    • Intolerant Patriot

      Mocking us will not change the fact as Mark Twain described India as the cradle of all civilizations!!

  • PENNY PINGLETON FAN PAGE

    the Earth revolves around my rear lol

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  • http://www.bdshop.com Zakir Hosen

    Great info!

    • http://www.astronomytrek.com/ Pete

      Thanks. I’m glad it helped!

    • Shrek2

      yeah asian man u go gurl

  • Brooke

    who was the first

    • http://www.astronomytrek.com/ Pete

      Aristarchus of Samos (310BC–230 BCE) proposed a heliocentric theory sometime in the 2nd century BC, which was subsequently rejected by his peers. Nicolaus Copernicus, on the other hand, produced a fully predictive mathematical model in his book ‘De revolutionibus orbium coelestium’, but he didn’t release it until just before his death in 1543AD, however, for fear of reprisals from the Catholic Church.

      • Joe

        Religion always in the way of progress.

      • Nikon

        Since all the original Greek writings have “deliberately disappeared”, and we suspect where they are hidden, we can only speculate which of these subsequent “original” discoveries may not be that original at all!

        • Ruth

          Psalm 19:6 written years before Christ describes the sun as the center and its circuit throughout the universe.

          • ADELAR SCHEIDT

            Psalms 19:5-6
            5 It is like a bridegroom coming out of his chamber, like a champion rejoicing to run his course.
            6 It rises at one end of the heavens and makes its circuit to the other; nothing is deprived of its warmth.

            There’s nothing about the sun being the center; you gotta make quite a stretch to fit Astronomy into your Religion.

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  • shrek2

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    • boi

      yeah man

      • nigga

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    • shrek

      dumb ass

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  • Renee

    Helaman 12:15
    “And thus, according to his word the earth goeth back, and it appeareth unto man that the sun standeth still; yea, and behold, this is so; for surely it is the earth that moveth and not the sun.”
    I read this scripture and was curious who the first person was to discover that the earth revolves around the sun. This text dates about 6 BC, so maybe this is early evidence.

  • Kenny

    Note that the geocentric model was “settled science.”