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Who among the old greek philosophers was the first to propose perfect circular motion for celestial objects?
I'm pretty sure it was not Russians. In fact it was lately Magellan, before him there were Alexandrian astronomer Ptolemy (2nd cent. AD), Gaius or Caius Plinius Secundus (23 AD), Strabo (borderline BC to AD) and Greek scholar Eratosthenes of Cyrene (267 BC), Homer in his Odyssey has known the fact of the Round World (8th century BC). So, I'd say Greek maritime knew it around 8-9 centuries before Christ (in Europe) since they had nice fleet and could travel around the Earth. In Northern Europe Vikings knew long before but were not documenting it properly, so it only formed in a way of the tales.
If you look at the Chinese, these folks knew the concept around 5th century BC, Zeng Shen (505 BC- 436 BC).
Arabs calculated the circumference of the Planet around 8th cent. AD.
India: Aryabhata (4-5c AD)
I'm not really sure, but I do think that the first time the whole world really became aware of the earth's spherical nature was when the Russians put the first artificial satellite into orbit in 1957, it was called Sputnik.
Answer(3)
The world was first 'proven' to be spherical by Ferdinand Magellan - he was the first man to sail around the world (actually he was killed en route but his crew continued the voyage and he was rightly credited). A lot of people answer Columbus to this type of question but by his time it was well known the world wasn't flat!
What else can I help you with?
Why did aristotles geocentric theary fail match the expected predictions?
Aristotle's geocentric theory failed to accurately predict celestial phenomena because it relied on incorrect assumptions about the motion of celestial bodies. Aristotle believed that celestial objects moved in perfect circular orbits around Earth, which did not match the observed motions of planets and stars. Additionally, his theory was unable to explain retrograde motion, where planets appear to move backwards in the sky.
Why did greek astronomers conclude that the heavens were made up of perfect crystalline spheres moving at a constant speed?
Greek astronomers believed in the perfection and order of the universe, influenced by their philosophical beliefs. They thought that circular motion represented perfection, and the movement of celestial bodies in perfect spheres at constant speeds aligned with this notion. Additionally, observations of celestial phenomena like the uniformity of star patterns supported this idea.
What was Aristole's earth-centered theory of the universe called?
Aristotle's earth-centered theory of the universe is called geocentrism. It posited that the Earth was stationary at the center of the universe, with celestial bodies orbiting around it in perfect, circular paths.
Which planet has the perfect circular orbit?
No planet has a perfectly circular orbit, though Venus has the least orbital eccentricity of any planet in our solar system.
What was the medieval view of the Earth and the planets?
The medieval view of the Earth and the planets was the Earth was a motionless object suspended in the middle of the universe, and everything else in the universe, the sun, planets, stars, or any other astronomical objects, revolved around the Earth.
What 2 ideas about the universe did Greek philosophy accept?
Greek philosophers accepted the idea that the universe is governed by natural laws and principles that could be understood through reason and observation. They also believed in the concept of a geocentric model of the universe, where the Earth was at the center and celestial bodies moved around it in perfect circular motion.
What are some examples of circular objects of shapes?
Examples of circular objects include a wheel, which is a perfect circle used in vehicles; a clock face, which displays time in a circular format; and a dinner plate, typically round for serving food. Other examples are coins, which are often circular and used as currency, and hula hoops, which are circular toys used for exercise and fun. Each of these objects demonstrates the versatility and functionality of circular shapes in everyday life.
Why did aristotles geocentric theary fail match the expected predictions?
Aristotle's geocentric theory failed to accurately predict celestial phenomena because it relied on incorrect assumptions about the motion of celestial bodies. Aristotle believed that celestial objects moved in perfect circular orbits around Earth, which did not match the observed motions of planets and stars. Additionally, his theory was unable to explain retrograde motion, where planets appear to move backwards in the sky.
What did Plato say about motion in the heaven?
Plato believed that the heavens were composed of perfect, unchanging, and eternal forms known as "perfect circles". He argued that the celestial bodies moved in a circular motion around the Earth because circles are the most perfect and divine shape.
Why greek astronomers conclude that the heavens were made up of perfect crystalline spheres moviog at constant speeds?
Greek astronomers believed in the concept of uniform circular motion because they observed the predictable movement of the stars and planets across the sky. They thought that the most perfect shape was a circle and that the heavens, being divine and perfect, must move in circular paths at constant speeds to maintain order and harmony in the universe. This idea of celestial spheres helped them explain the motions of celestial bodies without the need for complex mathematical calculations.
Why was Aristotle wrong about the solar system?
He reasoned that since parallax could not be observed for celestial objects near the sun, then the earth was stationary. This erroneous assumption was because at the time he had no way of knowing that celestial objects were so far away that their parallax angles were too small to detect.He reasoned that since parallax could not be observed for celestial objects near the sun, then the earth was stationary. This erroneous assumption was because at the time he had no way of knowing that celestial objects were so far away that their parallax angles were too small to detect =) Hope it helped. I had the same question
To moves around the sun in nearly circular path?
Any satellite circling another object is considered to be 'orbiting' that object in a circular orbit.Wikipedia made the following statement, under topic, "circular orbit":"In astrodynamics or celestial mechanics a circular orbitis an elliptic orbit with the eccentricity equal to 0."Here, the 'eccentricity' would be referring to the degree to which the orbit moves outside that of forming a perfect cirular path. As a circular path would have no variance from being circular, of course, it has no "eccentricity/ies"
Why are planets that orbit around the Sun and satellites that orbit around these planets always called ellipses rather than perfect circles?
The planets, and the satellites that orbit around them, are affected by gravity from the sun and other celestial objects. The effects of gravity at different locations during their orbits prevent their orbits from being circular, and they become elliptical (more or less egg-shapped).
Why did greek astronomers conclude that the heavens were made up of perfect crystalline spheres moving at a constant speed?
Greek astronomers believed in the perfection and order of the universe, influenced by their philosophical beliefs. They thought that circular motion represented perfection, and the movement of celestial bodies in perfect spheres at constant speeds aligned with this notion. Additionally, observations of celestial phenomena like the uniformity of star patterns supported this idea.
What was Aristole's earth-centered theory of the universe called?
Aristotle's earth-centered theory of the universe is called geocentrism. It posited that the Earth was stationary at the center of the universe, with celestial bodies orbiting around it in perfect, circular paths.
What state of motion did Aristotle attribute to the Earth?
Aristotle believed that the Earth was the center of the universe and that it was at rest while the celestial bodies moved around it in perfect circular motion. This geocentric model was a central part of Aristotelian cosmology.
What use is the concept of perfect competition in business economics?
circular flow
