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Galileo's discoveries with the telescope sowed doubts about the ancient Ptolemaic model which had the Earth at the centre. First, Jupiter's moons orbited round Jupiter and not the Earth, the first objects that had been discovered that were not orbiting the Earth. Secondly the discovery of the phases of Venus raised doubt about the Ptolemaic model, particularly the gibbous phase when, we now know, Venus is round behind the Sun as seen from Earth. In the Ptolemaic model Venus never goes behind

the Sun (as seen from Earth) and the gibbous phase cannot happen.

By implying in the title of his book 'Dialogue of the two world systems' that there were only two models in contention, those of Ptolemy and Copernicus, Galielo insinuated that if the Ptolemaic model was incorrect the Copernican system must be correct. This was logically flawed because at the time there were two other systems in the public domain that both explained Venus's phases. These were the models of Tycho, which was geocentric, and finally Kepler's which was heliocentric.

Of these four, Kepler's was eventually accepted by everyone after Newton's theoretical discoveries showed that Kepler's elliptical orbits for the planets agreed with the new theory of dynamics.

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Vivien Metz

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2y ago
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Ashlee Farrell

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2y ago

Galileo's discoveries with the telescope did not support Copernicus's theory directly but they showed problems with the ancient Ptolemaic theory. The moons of Jupiter were the first things discovered that clearly did not orbit the Earth, while the range of Venus's phases was not fully explained by the Ptolemaic theory.

However Tycho Brahe had a theory that explained Venus's phases properly, while still having the Earth at the centre.

In the end the theory that gained acceptance was Kepler's, which also had the Sun at the centre. So Galielo was right all along, although there was no way of proving it during his lifetime.

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Joany Funk

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1y ago

Galileo saw the four largest moons of Jupiter in orbit around the planet, proving that the Ptolemaic system was not simpler - the solar system was not geocentric (the planets and the sun did not orbit around the earth).

As far as the observations of Venus go, Galileo saw that Venus displayed phases very much like our moon. Now, according to the Ptolemaic system, Venus could only display a crescent phase because its epicycle put it always in between Earth and the sun. The Copernican system put everything rotating around the sun, and in this way it explained the phases of Venus.

Think of it this way, if Venus is always in between the sun and the earth, how can we ever see it completely lit up, like a full moon? The sun is always on the other side of it, so Venus must at some point go on the other side of the sun.

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14y ago

Galileo saw the four largest moons of Jupiter in orbit around the planet, proving that the Ptolemaic system was not simpler - the solar system was not geocentric (the planets and the sun did not orbit around the earth).

As far as the observations of Venus go, Galileo saw that Venus displayed phases very much like our moon. Now, according to the Ptolemaic system, Venus could only display a crescent phase because its epicycle put it always in between Earth and the sun. The Copernican system put everything rotating around the sun, and in this way it explained the phases of Venus.

Think of it this way, if Venus is always in between the sun and the earth, how can we ever see it completely lit up, like a full moon? The sun is always on the other side of it, so Venus must at some point go on the other side of the sun.

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12y ago

Galileo saw the four largest moons of Jupiter in orbit around the planet, proving that the Ptolemaic system was not simpler - the solar system was not geocentric (the planets and the sun did not orbit around the earth).

As far as the observations of Venus go, Galileo saw that Venus displayed phases very much like our moon. Now, according to the Ptolemaic system, Venus could only display a crescent phase because its epicycle put it always in between Earth and the sun. The Copernican system put everything rotating around the sun, and in this way it explained the phases of Venus.

Think of it this way, if Venus is always in between the sun and the earth, how can we ever see it completely lit up, like a full moon? The sun is always on the other side of it, so Venus must at some point go on the other side of the sun.

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9y ago
Galileo was the first to observe the planets with a telescope and he made important discoveries.
Looking at Jupiter, he discovered four moons orbiting it. Up until then nothing had been found that was not orbiting the Earth, as they thought at that time. So it was a wake-up call indicating possible doubts about the old Ptolemaic system.

Looking at Venus, he discovered the phases of Venus as it moves in its orbit. The Ptolemaic model explains the crescent phase but it fails to account for the gibbous phase because in the Ptolemaic model Venus never goes round behind the Sun. So this was a definite fault with the Ptolemaic system.

Neither of the above were conclusive 'proofs' of the Copernican system, because Tycho Brahe then came up with a model that had Mercury and Venus orbiting the Sun, while the Sun and the other planets still orbited the Earth. This explained all the phases of Venus while still placing the Earth at the centre.

So nothing that Galileo discovered was a 'proof' of the Copernian system and in fact when Kepler came up with the model we use today it used the novel idea of elliptical orbits. The Sun was at the centre and this is the only part of Copernicus's model that has survived the test of time, with all the scientific discoveries that have been made since then.
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8y ago

Galileo's discoveries with the telescope did not support Copernicus's theory directly but they showed problems with the ancient Ptolemaic theory. The moons of Jupiter were the first things discovered that clearly did not orbit the Earth, while the range of Venus's phases was not fully explained by the Ptolemaic theory.

However Tycho Brahe had a theory that explained Venus's phases properly, while still having the Earth at the centre.

In the end the theory that gained acceptance was Kepler's, which also had the Sun at the centre. So Galielo was right all along, although there was no way of proving it during his lifetime.

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Q: How did Galileos observation of Jupiter and venus support Copernicus' model?
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Why isn't there life on Jupiter?

Because it is a gas giant and does not have a solid surface. It is made completely of gas and so it cannot support life.


Is it possible to stand on Jupiter?

Actually, no. there may be a solid surface at the core of Jupiter, but you would not be able to stand on it. Well to get to it because going through all those gases Jupiter is made up of may seem easy... possible but you would actually be crushed by the pressure of it and die a horrible death.


Who discovered Jupiter's moons?

Galileo discovered the four major moons. Others were added over the years by different people and by close up viewing by probes.The planet Jupiter has been known since ancient times and is visible to the naked eye in the night sky. The Romans named the planet after the Roman god Jupiter (also called Jove). The astronomical symbol for the planet is a stylized representation of the god's lightning bolt.The Chinese, Korean, Japanese, and Vietnamese refer to the planet as the wood star based on the Chinese Five Elements. In Vedic Astrology, Hindu astrologers refer to Jupiter as Brihaspati, or "Guru" which means the "Big One". In Hindi, Thursday is referred to as Guruvaar (day of Jupiter). In the English language Thursday is rendered as Thor's day, with Thor being identified with the Roman god Jupiter.In 1610, Galileo Galilei discovered the four largest moons of Jupiter, Io, Europa, Ganymede and Callisto (now known as the Galilean moons) using a telescope, the first observation of moons other than Earth's. This was also the first discovery of a celestial motion not apparently centered on the Earth. It was a major point in favor of Copernicus' heliocentric theory of the motions of the planets; Galileo's outspoken support of the Copernican theory placed him under the threat of the Inquisition.In 1892, E. E. Barnard observed a fifth satellite of Jupiter with the 36-inch refractor at Lick Observatory in California. The discovery, a testament to his extraordinary eyesight, made him quickly famous. The moon was later named Amalthea.


Can TREES make Jupiter a sustainable planet?

Firstly, Trees need landmass into which to spread their roots for support and it is doubtful that Jupiter has landmass. (If it is found to have landmass, it would be deep under the gas layers with far too much pressure to support any trees we have on Earth.) Secondly, Trees need water. If there is any water on Jupiter, it is in the core. Thirdly, Trees need sunlight and Jupiter's atmosphere would create conditions that were sufficiently occluded to prevent photosynthesis. (This avoids mentioning that the requisite oxygen and carbon dioxide are also missing from Jupiter's atmosphere in the necessary percentages.) Assuming, either by magic or significantly advanced technology, trees can survive on Jupiter, there are many other factors that would be necessary to make Jupiter inhabitable such as proper heating, prevalence of mid-level elements (such as carbon, oxygen, nitrogen, silicon, phosphorus et al., a clearer atmosphere, less pressure in habitable areas, and storm control (the Big Red Spot is a tornado larger than 3x the Planet Earth).


Can anyone breathe on jupiter?

Yes, you could breath BUT Jupiter's atmosphere can not support human life, It is mostly made of molecular hydrogen and helium in roughly solar proportions; other chemical compounds are present only in small amounts and include methane, ammonia, hydrogen sulfide and water.

Related questions

How did Galileo's observations of Jupiter's moons support Copernicus theory?

The discovery did not support Copernicus's theory directly but it raised doubts about the ancient theory of Ptolemy that said that all objects in the sky are in orbit round the Earth. Galileo was an aggressive supporter of Copernicus's theory but eventually it was Kepler's theory that became accepted and is still used today. Both Copernicus and Kepler placed the Sun at the centre but Kepler's elliptical orbits are supported by the later theory of dynamics.


Does Jupiter have fire?

No. There is noting to support combustion on Jupiter.


Does Jupiter support life?

No.


What anomalies did Galileos first astronomic observations reveal?

Galileo's first astronomical observations revealed several anomalies. He observed that Jupiter had four moons orbiting around it, which challenged the prevailing belief that everything in space revolved around the Earth. He also observed that Venus went through phases similar to the Moon, suggesting that it orbited around the Sun and not the Earth. These observations provided evidence to support the heliocentric model proposed by Copernicus.


Can Jupiter support life on its planet?

No, Jupiter cannot support life. Jupiter cannot support life because it has no atmosphere and also because the pressure is really strong on Jupiter and anything that enters its atmosphere would be crushed.It has little water. Umm, nu-huh... Jupiter CAN support life, just not any life that is present in the Earth system. There are many possibilities for life to exist in the Jupiter system, although none have as yet been detected. Jupiter DOES have an atmosphere, the planet is predominated by it. Jupiter DOES have water... in it's atmosphere.


Is there a volcano on Jupiter?

No, Jupiter is a gas planet. It has no solid surface to support plate tectonics.


How did galileos observation of Jupiter and venus support Copernicus's model?

Galileo saw the four largest moons of Jupiter in orbit around the planet, proving that the Ptolemaic system was not simpler - the solar system was not geocentric (the planets and the sun did not orbit around the earth). As far as the observations of Venus go, Galileo saw that Venus displayed phases very much like our moon. Now, according to the Ptolemaic system, Venus could only display a crescent phase because its epicycle put it always in between Earth and the sun. The Copernican system put everything rotating around the sun, and in this way it explained the phases of Venus. Think of it this way, if Venus is always in between the sun and the earth, how can we ever see it completely lit up, like a full moon? The sun is always on the other side of it, so Venus must at some point go on the other side of the sun.


Why is observation important?

Observation is important in science because it allows for recordings during an experiment. It also is used as support for hypotheses.


How does an observation evolve e into a scientific law?

an observation becomes an thesis through experimentation, proven info and support. a thesis becomes a theory through support and a theory becomes a law through even more support


Can Jupiter be colonized to support life?

no it is made of gas


How did Kepler's work improve on or support Copernicus' heliocentric?

Kepler completely replaced Copernicus's theory of the orbits of the planets, which was based on circles an epicycles, with a new theory using elliptical orbits. However Kepler retained Copernicus's idea of placing the Sun at the centre.


The discovery of the moons of jupiter lent support to which system?

The discovery of the moons of jupiter lent support to. the heliocentric system. If you apply equal forces to a cement truck and a compact car.