Examples of using Planetary model in English and their translations into Indonesian
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In the planetary model, helium's two electrons are shown circling the nucleus in a fixed orbit depicted as a ring.
Museum andplanetarium directors occasionally created controversy by omitting Pluto from planetary models of the Solar System.
The second problem was that the planetary model could not explain the highly peaked emission and absorption spectra of atoms that were observed.
In 1913, after returning to Copenhagen, he began publishing his theory of the simplest atom, hydrogen,based on the planetary model of the atom.
This led Rutherford to propose a planetary model in which a cloud of electrons surrounds a small, compact nucleus of positive charge.
Aryabhata(476 to 550), used his magnum opus, called Aryabhatiya(499), put forward a method of calculation,which was based on a planetary model.
Ibn Tufail and Al-Betrugi are the first to propose planetary models without any equant, epicycles or eccentrics.
For his planetary models, he invented a geometrical technique called a Tusi-couple, which generates linear motion from the sum of two circular motions.
Ibn Tufail and Nur Ed-Din Al Betrugi(Alpetragius)were the first to propose planetary models without any equant, epicycles or eccentrics.
An example is the planetary model of the atom in which electrons are pictured as orbiting the nucleus, analogous to the way planets orbit the Sun.
In a later treatise entitled Ta‘līq al-arṣād(“Comments on Observations'). he described the observations andprocedures with which he had constracted his new planetary models and derived new parameters.
In Ptolemy's planetary model, the earth was at the centre, the planets and the sun made circular orbits around the earth, and the stars were on a sphere outside of the orbits of the planet and the earth.
Whereas Ibn al-Shatir's concept of planetary motion was conceived in order toplay an important role in an earth-centred planetary model, Copernicus used the same concept of motion to present his sun-centred planetary model. .
Thus, the planetary model of the atom was discarded in favor of one that described atomic orbital zones around the nucleus where a given electron is most likely to be observed.[23][24].
In his 2nd century work the Almagest,the Hellenistic astronomer Claudius Ptolemaeus constructed a geocentric planetary model based on deferents and epicycles to explain Jupiter's motion relative to Earth, giving its orbital period around Earth as 4332.38 days, or 11.86 years.
In the text, Ibn al-Haytham also describes an early version of Occam's razor, where he employs only minimal hypotheses regarding the properties that characterize astronomical motions,as he attempts to eliminate from his planetary model the cosmological hypotheses that cannot be observed from Earth.
Most historians of Islamic astronomy believe that the planetary models developed at Marāgheh found their way to Europe(perhaps via Byzantium) and provided Nicolaus Copernicus(1473- 1543) with inspiration for his astronomical models. .
In the 12th century, Arzachel departed from the ancient Greek idea of uniform circular motions by hypothesizing that the planet Mercury moves in an elliptic orbit,while Alpetragius proposed a planetary model that abandoned the equant, epicycle and eccentric mechanisms, though this resulted in a system that was mathematically less accurate.
During the second century A.D.,Ptolemy had invented a geometric planetary model with eccentric circular motions and epicycles, significantly deviating from Aristotle's idea that celestial bodies moved in a fixed circular motion around the earth.
The Bohr Model is a planetary model in which the negatively charged electrons orbit a small, positively charged nucleus similar to the planets orbiting the Sun(except that the orbits are not planar)- the gravitational force of the solar system is mathematically akin to the attractive Coulomb(electrical) force between the positively charged nucleus and the negatively charged electrons.
In his Aryabhatiyabhasya, a commentary on Aryabhata's Aryabhatiya, he developed a planetary model where Mercury, Venus, Mars, Jupiter and Saturn orbit the Sun, which in turn orbits Earth, similar to the Tychonic system later proposed by Tycho Brahe in the late 16th century.
The classical model of the atom is called the planetary model, or sometimes the Rutherford model after Ernest Rutherford who proposed it in 1911, based on the Geiger- Marsden gold foil experiment which first demonstrated the existence of the nucleus.
But his efforts were unsuccessful in replacing Ptolemy's planetary model, due to the numerical predictions of the planetary positions in his configuration being less accurate than that of the Ptolemaic model, mainly because he followed Aristotle's notion of perfect circular motion.
For more on this point,see The classical model of the atom is called the planetary model, or sometimes the Rutherford model-after Ernest Rutherford who proposed it in 1911, based on the Geiger-Marsden gold foil experiment, which first demonstrated the existence of the nucleus.
He was unsuccessful in replacing Ptolemy's planetary model, as the numerical predictions of the planetary positions in his configuration were less accurate than those of the Ptolemaic model,[5] because of the difficulty of mapping Ptolemy's epicyclic model onto Aristotle's concentric spheres.