History of astronomy
... The Greeks had a notion that because the planets were located in the heavens, their motions must be “perfect”. Uniform, circular motion was regarded as perfect. So the planets must move through space uniformly on circles. But – the planets do not move uniformly to the east against the stars. Theref ...
... The Greeks had a notion that because the planets were located in the heavens, their motions must be “perfect”. Uniform, circular motion was regarded as perfect. So the planets must move through space uniformly on circles. But – the planets do not move uniformly to the east against the stars. Theref ...
chapter3 - Empyrean Quest Publishers
... 1. Earth could not be moving because objects in air would be left behind. He said air moves with earth. 1. Non-circular orbits are not “perfect” as heavens should be. He found ...
... 1. Earth could not be moving because objects in air would be left behind. He said air moves with earth. 1. Non-circular orbits are not “perfect” as heavens should be. He found ...
The development of science during the renaissance The
... to be correct and didn’t allowed any ideas which weren’t the same as theirs. People who had different ideas were arrested and put in jail or were killed. This was called the inquisition. Copernicus Copernicus was a German born in 1473. He discovered that the sun was the center of the universe: his h ...
... to be correct and didn’t allowed any ideas which weren’t the same as theirs. People who had different ideas were arrested and put in jail or were killed. This was called the inquisition. Copernicus Copernicus was a German born in 1473. He discovered that the sun was the center of the universe: his h ...
Revolutionary Times: Copernicus and Tycho Brahe
... Tycho observed a comet, and invited others in various farflung locations to describe what they had seen. From the lack of measurable parallax, he proved that the comet was farther away than the moon – not an atmospheric effect, as some had maintained. The comet had to be moving through the realm of ...
... Tycho observed a comet, and invited others in various farflung locations to describe what they had seen. From the lack of measurable parallax, he proved that the comet was farther away than the moon – not an atmospheric effect, as some had maintained. The comet had to be moving through the realm of ...
Ancient to Modern Astronomy
... of gravity. This allows us to find the mass of an object from the orbits of its satellites. For example, we can find the mass of Jupiter by calculating how long it takes one of its moons to go around it. (possible lab) We can even use a more complicated version of this law to find the masses of gala ...
... of gravity. This allows us to find the mass of an object from the orbits of its satellites. For example, we can find the mass of Jupiter by calculating how long it takes one of its moons to go around it. (possible lab) We can even use a more complicated version of this law to find the masses of gala ...
Decline of Western Civilization (extended) knowledge of ancient
... regular observations of Sun, Moon and Planets large number of observations greatest precision to date did not detect any stellar parallax [parallax.avi] heliocentric model rejected due to lack of observed stellar parallax Tycho Brahe’s geocentric model [figure 4-12] Sun and Moon orbit Earth, while p ...
... regular observations of Sun, Moon and Planets large number of observations greatest precision to date did not detect any stellar parallax [parallax.avi] heliocentric model rejected due to lack of observed stellar parallax Tycho Brahe’s geocentric model [figure 4-12] Sun and Moon orbit Earth, while p ...
Our Place in the Cosmos
... did Ptolemy add to his model? In what ways was the Ptolemaic model a good scientific model and in what ways was it not? What is the Copernican model and how did it ...
... did Ptolemy add to his model? In what ways was the Ptolemaic model a good scientific model and in what ways was it not? What is the Copernican model and how did it ...
Class 1: From Astrology to Astronomy
... • Around 100 BC Claudius Ptolemy took Aristotle's system and put math to it. • He published this in a massive book called the Almagest. • It was the authority for astronomy for almost the next 1000 years. ...
... • Around 100 BC Claudius Ptolemy took Aristotle's system and put math to it. • He published this in a massive book called the Almagest. • It was the authority for astronomy for almost the next 1000 years. ...
The Milky Way
... • 100 AD -200 AD – Wrote Astronomy text Almagest. – Geocentric model • Earth center of the universe and the moon, mercury and Venus are in between the earth and sun. ...
... • 100 AD -200 AD – Wrote Astronomy text Almagest. – Geocentric model • Earth center of the universe and the moon, mercury and Venus are in between the earth and sun. ...
ppt
... • Mars, Jupiter, Saturn: move eastward within the zodiac, but each one makes a westward loop once a year when its farthest from the sun •Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be expl ...
... • Mars, Jupiter, Saturn: move eastward within the zodiac, but each one makes a westward loop once a year when its farthest from the sun •Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be expl ...
Motions of the Planets: Not the same as Stars!
... • Mars, Jupiter, Saturn: move eastward within the zodiac, but each one makes a westward loop once a year when its farthest from the sun • Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be ex ...
... • Mars, Jupiter, Saturn: move eastward within the zodiac, but each one makes a westward loop once a year when its farthest from the sun • Uranus, Neptune: need a telescope to see them, bu they each describe westward loops once a year, each smaller than the previous planet. How can this motion be ex ...
Copernicus, Kepler, Galileo, Newton
... modern values of planet/earth orbit ratios. System worked very well. Contrary to popular myths, Ptolemy's system was not overly cumbersome, and it accounted for subtleties like the uneven motion of the Sun It is not Ptolemy's fault he did such a good job that it took 1500 years to improve on ...
... modern values of planet/earth orbit ratios. System worked very well. Contrary to popular myths, Ptolemy's system was not overly cumbersome, and it accounted for subtleties like the uneven motion of the Sun It is not Ptolemy's fault he did such a good job that it took 1500 years to improve on ...
How has the model of the solar system changed over time?
... of planet orbits, not the circle. This idea went against the 2,000 years of belief! Kepler had a hard time convincing other scientists of his time that planet orbits are not circles. Even the great scientist, Galileo, ...
... of planet orbits, not the circle. This idea went against the 2,000 years of belief! Kepler had a hard time convincing other scientists of his time that planet orbits are not circles. Even the great scientist, Galileo, ...
The Roots of Astronomy Stonehenge
... The Roots of Astronomy • Already in the stone and bronze ages, human cultures realized the cyclic nature of motions in the sky. • Monuments dating back to ~ 3000 B.C. ...
... The Roots of Astronomy • Already in the stone and bronze ages, human cultures realized the cyclic nature of motions in the sky. • Monuments dating back to ~ 3000 B.C. ...
Geocentric vs. Heliocentric
... The earth is at the center The Sun, stars, and planets on their spheres revolve around the earth: explains daily movement To account for unusual planetary motion epicycles were introduced Fit the Greek model of heavenly perfection – spheres are the perfect shape, circular is the perfect motion. ...
... The earth is at the center The Sun, stars, and planets on their spheres revolve around the earth: explains daily movement To account for unusual planetary motion epicycles were introduced Fit the Greek model of heavenly perfection – spheres are the perfect shape, circular is the perfect motion. ...
Motion of stars, planets
... 1. The Copernican model has a force between the sun and the planets. Actually, the natural motion of the celestial spheres drove the planetary motions. 2. The Copernican model was simpler than the Ptolemaic one. In fact, though Copernicus eliminated circles to explain retrograde motion, he added mor ...
... 1. The Copernican model has a force between the sun and the planets. Actually, the natural motion of the celestial spheres drove the planetary motions. 2. The Copernican model was simpler than the Ptolemaic one. In fact, though Copernicus eliminated circles to explain retrograde motion, he added mor ...
Early Astronomy and Gravity
... • Ptolemy (~140 AD) devised a new geocentric theory to explain this. ...
... • Ptolemy (~140 AD) devised a new geocentric theory to explain this. ...
PPT: The Scientific Revolution
... extreme of skepticism by doubting his own existence. Then, he realized that his own act of thinking proved his own existence (I think, therefore, I am.) Challenges to Religion: The idea that the universe worked like a machine according to natural laws and without the intervention of God challenged e ...
... extreme of skepticism by doubting his own existence. Then, he realized that his own act of thinking proved his own existence (I think, therefore, I am.) Challenges to Religion: The idea that the universe worked like a machine according to natural laws and without the intervention of God challenged e ...
1 Timeline 2 Geocentric model
... • Assumption of uniform circular motion not based on observations but on philosophy Predictive value of Ptolemaic model Prediction of phases of Venus ...
... • Assumption of uniform circular motion not based on observations but on philosophy Predictive value of Ptolemaic model Prediction of phases of Venus ...
The Scientific Revolution - Online
... When he observed an apple fall from a tree, Newton thought: The apple is accelerated as it moves from the tree toward the ground. There must be a force that acts on the apple to cause this acceleration. Let's call the force gravity. If the force of gravity reaches to the top of the highest tree, mi ...
... When he observed an apple fall from a tree, Newton thought: The apple is accelerated as it moves from the tree toward the ground. There must be a force that acts on the apple to cause this acceleration. Let's call the force gravity. If the force of gravity reaches to the top of the highest tree, mi ...
History of astronomy - Part I.
... notion of the “harmony of the spheres”. Philolaus (ca. 470-385 BC) – first to advocate that the Earth was in motion around a “central fire” ...
... notion of the “harmony of the spheres”. Philolaus (ca. 470-385 BC) – first to advocate that the Earth was in motion around a “central fire” ...
Practice Midterm
... (c) its orbit around the sun is inside Earth’s orbit (d) its orbit around the sun is outside Earth’s orbit (e) actually, the evening or morning star is usually Mars, not Venus 3. The most significant difference between the astronomical theories of Ptolemy and Copernicus is (a) Ptolemy’s is not based ...
... (c) its orbit around the sun is inside Earth’s orbit (d) its orbit around the sun is outside Earth’s orbit (e) actually, the evening or morning star is usually Mars, not Venus 3. The most significant difference between the astronomical theories of Ptolemy and Copernicus is (a) Ptolemy’s is not based ...
Astronomy Lecture 1a
... ___ 1. Momentum depends upon a body's A.velocity B.mass C.momentum depends upon both the velocity and mass of an object ___ 2. The Summer Solstice occurs in A.May B.June C.July D.August E.the Summer Solstice can occur during either June or July, depending upon the relative position of the Sun ___ 3. ...
... ___ 1. Momentum depends upon a body's A.velocity B.mass C.momentum depends upon both the velocity and mass of an object ___ 2. The Summer Solstice occurs in A.May B.June C.July D.August E.the Summer Solstice can occur during either June or July, depending upon the relative position of the Sun ___ 3. ...
De revolutionibus orbium coelestium
De revolutionibus orbium coelestium (On the Revolutions of the Heavenly Spheres) is the seminal work on the heliocentric theory of the Renaissance astronomer Nicolaus Copernicus (1473–1543). The book, first printed in 1543 in Nuremberg, Holy Roman Empire, offered an alternative model of the universe to Ptolemy's geocentric system, which had been widely accepted since ancient times.