Part 1:
it was never my intent to besmirch any religious faith. Just to point out some strange legends (to someone who has grown up with deep study in mathematics the physical sciences) .
Astronomy has a long history of finding the “truth” regardless of cultural or religious beliefs, some of which still stand.
Even Christianity has some odd ball practices. Both in ancient times and still today. It has been a long road of observations and reasoned thought of the natural word to describe what we think we know today as descriptions of the physical natural world. Note that what we do know is sufficient to get us all the functional satellites to orbit for our technological purposes. (GPS, communication systems, military security, weather, you name it. We have gone to the Moon and safely returned, We have sent probes to gather information about the outer planets and some have departed the solar system. None of those accomplishments has its roots I the belief that a bear, puma, dragon, turtle or demons is eating the sun during a solar eclipse. People had to observe and apply experimental though and logic to determine what is really happening. You can’t hide your head in the sand when a natural event happens if you want to understand why it happens.
With a little thought Why can’t it be the moon as the cause of an eclipse? Babylonians and the Assyrians, and Mayans were able to predict eclipses. The beginnings of the
Scientific Method. You have to carefully watch an event and make observations, even without advanced mathematics in the picture, the reason may become obvious from observation. A day or two before an eclipse, a thin sliver of the moon can be seen very close to the location of the morning rising sun. Then within a day after the eclipse, a sliver of the moon is visible close to the location of the setting sun. I saw the such a moon just 26 hours after the eclipse. The moon obviously travels around the sky during the period of 30 days Where do you think the moon went between those times? Why is it unreasonable to believe that the moon (clearly a solid object) passes in front of the sun, thus blocking it out. There are also times when the moon may occult (pass in front of) a bright star. Is the star being eaten?
The prevailing astronomical model of the cosmos in Europe in the 1,400 years leading up to the 16th century was the Ptolemaic System, a
geocentric model created by the Roman citizen
Claudius Ptolemy in his
Almagest, dating from about 150 CE. Throughout the
Middle Ages it was spoken of as the authoritative text on astronomy, although its author remained a little understood figure frequently mistaken as one of the
Ptolemaic rulers of Egypt.
[5] The
Ptolemaic system drew on many previous theories that viewed Earth as a stationary center of the universe.
Since the 13th century, European scholars were well aware of problems with Ptolemaic astronomy.
The major features of Copernican theory are:
Heavenly motions are uniform, eternal, and circular or compounded of several circles (epicycles).
The center of the universe is near the Sun.
Around the Sun, in order, are Mercury, Venus, the Earth and Moon, Mars, Jupiter, Saturn, and the fixed stars.
The Earth has three motions: daily rotation, annual revolution, and annual tilting of its axis.
Retrograde motion of the planets is explained by the Earth's motion, which in short was also influenced by planets and other celestial bodies around Earth.
The distance from the Earth to the Sun is small compared to the distance to the stars.
The
Copernican Revolution, a
paradigm shift from the
Ptolemaic model of the heavens, which described the cosmos as having
Earth as a stationary body at the center of the universe, to the
heliocentric model with the
Sun at the center of the
Solar System, spanned over a century, beginning with the publication of Copernus'
De revolutionibus orbium coelestium and ending with the work of
Isaac Newton.
From a modern point of view, the Copernican model has a number of advantages. Copernicus gave a clear account of the cause of the seasons: that the Earth's axis is not perpendicular to the plane of its orbit.
Galileo studied
speed and
velocity,
gravity and
free fall, the
principle of relativity,
inertia,
projectile motion and also worked in
applied science and technology, describing the properties of the
pendulum and "
hydrostatic balances"
Galileo's championing of
Copernican heliocentrism was met with opposition from within the
Catholic Church and from some astronomers. The matter was investigated by the
Roman Inquisition in 1615, which concluded that heliocentrism was foolish, absurd, and heretical since it contradicted the
Ptolemaic system.
Galileo later defended his views in
Dialogue Concerning the Two Chief World Systems (1632), which appeared to attack
Pope Urban VIII and thus alienated both the Pope and the
Jesuits, who had both supported Galileo up until this point.
[9] He was tried by the Inquisition, found "vehemently suspect of heresy", and forced to recant. He spent the rest of his life under house arrest.
Galileo and Jupiter's moons
On 7 January 1610, Galileo observed with his telescope what he described at the time as "three fixed stars, totally invisible
[a] by their smallness", all close to Jupiter, and lying on a straight line through it.
[49] Observations on subsequent nights showed that the positions of these "stars" relative to Jupiter were changing in a way that would have been inexplicable if they had really been
fixed stars. On 10 January, Galileo noted that one of them had disappeared, an observation which he attributed to its being hidden behind Jupiter. Within a few days, he concluded that they were
orbiting Jupiter: he had discovered
three of Jupiter's four largest moons
Galileo's observations of the satellites of Jupiter caused controversy in astronomy: a planet with smaller planets orbiting it did not conform to the principles of
Aristotelian cosmology, which held that all heavenly bodies should circle the Earth,
[53][54] and many astronomers and philosophers initially refused to believe that Galileo could have discovered such a thing
In February 1616, an Inquisitorial commission declared heliocentrism to be "foolish and absurd in philosophy, and formally heretical since it explicitly contradicts in many places the sense of Holy Scripture".
OOPS - heresy
In view of Galileo's rather implausible denial that he had ever held Copernican ideas after 1616 or ever intended to defend them in the
Dialogue, his final interrogation, in July 1633, concluded with his being threatened with torture if he did not tell the truth, but he maintained his denial despite the threat.
[143][144][145]
The sentence of the Inquisition was delivered on 22 June. It was in three essential parts:
Galileo was found "vehemently suspect of heresy" (though he was never formally charged with heresy, relieving him of facing corporal punishment),
[146] namely of having held the opinions that the Sun lies motionless at the centre of the universe, that the Earth is not at its centre and moves, and that one may hold and defend an opinion as probable after it has been declared contrary to Holy Scripture. He was required to "
abjure, curse and detest" those opinions.
[147][148][149][150]
He was sentenced to formal imprisonment at the pleasure of the Inquisition.
[151] On the following day, this was commuted to house arrest, under which he remained for the rest of his life.
[152]
His offending
Dialogue was banned; and in an action not announced at the trial, publication of any of his works was forbidden, including any he might write in the future.
Impact on modern science
Glileo showing the
Doge of Venice how to use the telescope (fresco by
Giuseppe Bertini, 1858)
According to
Stephen Hawking,
Galileo probably bears more of the responsibility for the birth of modern science than anybody else,[237] and Albert Einstein called him the father of modern science