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2009-05-15 05:22:42
2009-05-15 05:22:42

The Terrestrial planets have a higher density. Their structure includes a large percentage of rock, while the Jovian planets are composed mostly of gas.

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Jovian planets are more massive and lower in average density. Terrestrial planets are smaller and higher in average density.


The terrestrial planets are primarily composed of rock and the jovian planets are mostly gas (primarily Hydrogen). Rock has a higher density than Hydrogen, giving the terrestrial planets a higher density.


Terrestrial Planets are more dense than Jovian planets because terrestrial planets are mainly made of solids such as rock and metal, whilst Jovian planets are mainly made of gasses, and the density of solids is much higher than that of gases



Venus is terrestrial. It has a solid surface and is primarily solid in composition. Jovian planets are primarily gaseous. Terrestrial planets, due to a higher density, are found on the inner orbits of the solar system. Pluto is actually neither, as its composition is mostly icy rather than metallic elements like terrestrial planets. It is likely that Pluto is a either a captured body (perhaps a comet), or the leftover material of a planetary collision early in the solar system's history.


Dependant on how the debris from supernovae is moving, the proportions of certain materials present, and the initial conditions of solar systems forming different combinations of terrestrial and Jovian planets are formed. Terrestrial planets are comprised of heavier particles (ie. of higher relative atomic mass) meaning they have stronger gravity which leads to higher density planets than the gaseous Jovian planets. A Jovian planet can be thought of as a failed star - it has all the elements needed to fuel nuclear fusion, but not enough gravity to attain the nuclear activation energy required. So the Sun started as a large cloud mostly comprising of gases, and terrestrial planets were formed from clouds mostly consisting of heavy solids.


The four inner, rocky planets are also known as the terrestrial planets (Mercury, Venus, Earth and Mars), they have a clearly defined terrain (unlike the four outer gas giant planets). They are smaller than the gas planets, but have a higher density.


Because solar can absorb higher sun rays


Characteristics of Jovian Planets Planets in the Solar System can be placed under two categories: terrestrial planets and jovian planets. Terrestrial planets are small planets made of rock, while jovian planets, also referred to as the 'gas giants', are made up of gaseous substances, mostly hydrogen. Read on to learn about the different characteristics of jovian planets...According to the Solar Nebula hypothesis for the formation of the Solar System, the Solar system was nothing but a rotating mass of clouds, in the beginning. Primarily composed of hydrogen and helium, these clouds also had traces of heavier elements. As the speed of rotation of the cloud mass or nebula increased, heat and pressure began to develop within. This gradual build up of heat and pressure caused the nebula to explode. The center of the nebula, known as the protosun, was the region of highest temperature and the matter around this protosun was automatically reduced to the gaseous state. However, regions close to the circumference of the nebula were cooler and it was here that matter was found in the condensed form.After the formation of the Solar System, the gravitational force of the sun gradually pulled the masses of higher density towards it due to which the planets made of rocks began to revolve in smaller orbits around the sun. The planets made of gaseous matter, however, moved to orbits farther away from the sun. Revolving in their orbits around the sun gave the planets a spherical shape. The immense gravitational pull of the large gaseous planets attracted matter scattered around the solar system and this matter, both rock particles and gases, began to revolve around these planets and thus the rings and many moons of these planets were formed.


planets that are closer to the sun usually will have higher density compared to ones further from the sun.


There are the four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. Then there are the four outer gas giant planets are Jupiter, Saturn, Uranus and Neptune. The inner planets are smaller and have a higher average density. The outer planets are much larger, but have no real surface - just atmosphere that gets thicker as you travel inwards.


The outer planets have rings and satellites And Inner planets are called terrestrial planets because they are rocky. (Like Earth.) and receive more of the sun's energy so they have higher temperatures


The four inner, terrestrial or rocky planets all have similar densities, much higher than the four outer gas giant planets (though the outer planets are much larger and more massive).


Each of the four inner planets have a clearly defined terrain. They are different to the gas planets, which don't have a clear solid surface. The inner planets are also much smaller and less massive, yet have a higher density than the outer planets. The inner planets have fewr moons due to their smaller mass and size. As they are closer to the sun, they orbit the sun in less time and are also warmer.


The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars. The four outer gas giant planets are Jupiter, Saturn, Uranus and Neptune. The inner planets are smaller and have a higher average density. The outer planets are much larger, but have no real surface - just atmosphere that gets thicker as you travel inwards. The outer planets all have a ring system (the inner planets dont) while the outer planets have captured a lot more natural satellites or moons than the inner planets.


Gas giants have a higher mass. This means that the gas giants have a more gravity to hold moons in orbit around them.


The inner planets are also called the stoney or rocky planets. The outer planets are called gas giants. Don't confuse density with mass. A ton of feathers has a greater mass than half ton of iron. So the inner planets are more dense than the outer planets, but the huge outer planets have more mass.


Because the outer planets are composed of mainly gas or ice, whereas the inner planets are composed of rock which has a higher density.


It is my understanding that, due to their close proximity to the Sun, and the corresponding higher temperatures, lighter gases (mainly hydrogen and helium) evaporated off into space.



The composition (the "stuff" they are made of) of the two types are very different. Terrestrial planets, or "rock" planets, are composed mainly of metals and/or silicate rocks. They tend to be (relatively) small in size. Jovian planets, or "gas" planets, are obviously composed of gasses. Hydrogen (H) and Helium (He), are usually in high abundance, along with trace amounts of other gaseous elements. Interestingly, it is also theorized that some Jovians, such as Jupiter, may also have a solid core. Finally, the composition of Uranus and Neptune differ from that of Jupiter and Saturn. While all are primarily H and He, the two most distant planets also have higher amounts of "ices". Examples are methane, ammonia, and H2O. Planets such as Uranus and Neptune are sometimes categorized as "ice giants".



The inner four planets, Mercury, Venus, Earth and Mars, are termed "rocky" or terrestrial since they are largely silicates and metals. The outer planets Jupiter, Saturn, Uranus and Neptune are all thought to have rocky cores but since those have a much higher fraction of gas in their composition, the emphasis is placed on the rocky inner planets.


The density of air decreases at higher altitudes.


Higher than what ?? If the object's density is higher than the density of water, then the object sinks in the water.



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