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Why do scientists not accept the ptolemaic model?
The Ptolemaic model is also known as the geocentric model, where the Earth is at the center of the solar system. Scientists refute this because orbital paths show that the solar system is heliocentric.
In the Ptolemaic Greek model of the universe the stars are attached to the?
In the Ptolemaic Greek model of the universe, the stars are thought to be attached to the celestial sphere, a hypothetical invisible sphere surrounding the Earth to which the stars were fixed. This model placed Earth at the center of the universe with all celestial bodies orbiting around it.
What three incorrect idea held back the development of modern astronomy from the time of modern astronomy from the time of Aristotle until 16th century?
Scientific theories are based on observations and deductions, and the Ptolemaic theory of the solar system fitted the observations of the planets' positions quite well, so it was not wrong, it was OK until better measurement methods showed that it needed improving. The Ptolemaic model of a planet's orbit, also used by Copernicus, had the planet moving round a small circle called an epicycle once, while the centre of the epicycle moved round a circular path, also once, in the opposite direction. This is not a bad model for an elliptical orbit with low eccentricity, which looks like a circle with an offset centre, which is what the Ptolemaic model describes. But Kepler had Tycho's recent observations when he discovered the new laws of planetary motion in which the planets move in ellipses. Tycho's measurements were just accurate enough to allow Kepler to discover the difference. So the old ideas had to wait until the science of measurements were good enough to point the way to elliptical orbits, and that took a long time.
What is the best definition of the term epicycle?
An epicycle is a small circle whose center moves along the circumference of a larger circle, used in ancient astronomy to explain the complex movements of celestial bodies, particularly the retrograde motion of planets. This concept was part of the Ptolemaic system, which posited that planets moved in small circles (epicycles) while simultaneously orbiting the Earth in larger circles (deferents). The term has since been used more broadly in various contexts to describe complex or convoluted processes.
Which greek scientist devised the qeocentric model?
The geocentric model, also known as the Ptolemaic system, is a theory that was developed by philosophers in Ancient Greece and was named after the in science and technology, the geocentric model seems preposterous.
What is the centre in the Ptolemaic model of the universe?
Earth
Was the geocentric model of Ptolemy based on epicycles and deferents?
Yes it was, because the Greeks believed that the planets must follow the perfect shape, the circle. We now know the planets travel in ellipses, but in those days Ptolemy allowed for that by introducing the idea of epicycles. An epicycle is a small circle whose centre travels round a bigger circle, and the planet travels round the epicycle. A circle and an epicycle is a very accurate model of an ellipse provided the eccentricity factor is small, as it is for most of the planets, which is why it took over 1400 years for this concept to be questioned. A further complication was that the Greeks believed the Earth was at the centre. We now know that the Sun is at the centre, but Ptolemy's model had to allow for the observed effects by introducing extra epicycles. For the inner planets these 'spurious' eipcycles were very large. In the end the Ptolemaic model was very complicated, with 40-50 epicycles altogether.
Why do scientists not accept the ptolemaic model?
The Ptolemaic model is also known as the geocentric model, where the Earth is at the center of the solar system. Scientists refute this because orbital paths show that the solar system is heliocentric.
In the Ptolemaic (Greek) model of the universe the stars are attached to the?
celestial sphere . . . ?
What was a major flaw of the Ptolemaic model?
A major flaw of the Ptolemaic model was its complexity in explaining the retrograde motion of planets. Ptolemy introduced the concept of epicycles and deferents to account for this, which made the model overly complicated and not as accurate as later models, such as the heliocentric model proposed by Copernicus.
In the Ptolemaic Greek model of the universe the stars are attached to the?
In the Ptolemaic Greek model of the universe, the stars are thought to be attached to the celestial sphere, a hypothetical invisible sphere surrounding the Earth to which the stars were fixed. This model placed Earth at the center of the universe with all celestial bodies orbiting around it.
How was Copernican model was an immediate improvement from Ptolemaic?
It was not an immediate improvement and actually it used more epicycles than the Ptolemaic mode so was more complicated. But the idea that the Sun is at the centre was taken up by Kepler in his studies of planets' orbits that led to the laws of planetary motion and eventually to the dynamic model of the solar system devised by Newton and others, which is the generally accepted model at the present time.
Did it take 2 centuries for copernican models replace ptolemaic model?
yes
Ask me a question :)?
how did the ptolemaic model supposedly agree with the bible
How does the Ptolemaic model differ from the modern day model?
The Ptolemaic model has all of the planets moons and stars moving around the Sun. The modern day Copernican model has all the planets moving around the Sun, with the moons moving around the planets, and the Sun and its "system" moving around the Milky Way.
What was ptolemy's explanation about the orbits of mercury and venus?
Venus moved on an eccentric and epicycle, the same as outer planets, but the Center of the epicycle followed the mean sun. Mercury is more confusing, with a crank mechanism that brings the epicycle closer and farther in an ellipse throuout the year, there probably was an Equant too. Venus' model at least was very accurate, and I can't find Mercury's accuracy.
What three incorrect idea held back the development of modern astronomy from the time of modern astronomy from the time of Aristotle until 16th century?
Scientific theories are based on observations and deductions, and the Ptolemaic theory of the solar system fitted the observations of the planets' positions quite well, so it was not wrong, it was OK until better measurement methods showed that it needed improving. The Ptolemaic model of a planet's orbit, also used by Copernicus, had the planet moving round a small circle called an epicycle once, while the centre of the epicycle moved round a circular path, also once, in the opposite direction. This is not a bad model for an elliptical orbit with low eccentricity, which looks like a circle with an offset centre, which is what the Ptolemaic model describes. But Kepler had Tycho's recent observations when he discovered the new laws of planetary motion in which the planets move in ellipses. Tycho's measurements were just accurate enough to allow Kepler to discover the difference. So the old ideas had to wait until the science of measurements were good enough to point the way to elliptical orbits, and that took a long time.
