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They are bigger because the Outer Planets had less gas and dust taken away from them when the solar system was forming. The Inner planets were closer to the sun, so the sun took more gas and dust away from those bodies, but didn't take away from the Outer bodies.

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2008-12-18 00:20:10
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Q: Why are the Outer Planets much larger than the Inner Planets?
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What makes the inner planets different from the outer planets?

The inner planets are small and rocky, the outer planets are much larger and have no solid surface, they are called the gas giants.


What is the main difference the inner planets and the outer planets?

The inner planets are relatively small and terrestrial, the outer planets are much larger and gaseous. Mercury is the only planet without an atmosphere.


Are the inner planets smaller than the outer planets?

yes the inner planets are much smaller then the outer planets


Characteristics of outer planets?

The four outer planets; Jupiter, Saturn, Uranus and Neptune are all much larger than the inner planets. These outer planets have no real surface, they are composed mainly of Hydrogen and helium gas, which gets thicker and thicker until the extreme pressures closer to the core of the planets change the state of the gases. The outer planets are much colder than the inner planets due to their distance from the sun, they take much longer to orbit the sun due to this distance. The outer planets are a lot larger than the inner planets.


How are the inner and outer planets different?

The inner planets are all rocky planets. The outer planets are completely made up of gases. The inner planets are much smaller than the outer planets.


How do inner planets and outer planets compare?

The inner planets, are much smaller than the outer planets. Also, all of the outer planets have a gas surfase, meaning you could no stand on them. And, none of the inner planets have rings, however, all of the outer planets do.


How are the outer planets different?

The outer planets are much larger than the inner planets and are made mostly of hydrogen, helium and ice. They rotate faster than the inner planets, more than once each Earth day. The inner planets are made mostly of iron and rock, and rotate slower.


What are the main characteristics of outer planets?

The four outer planets - Jupiter, Saturn, Uranus, Neptune - are gas giants. Compared to the four inner planets:* They are much larger. * They have a much larger mass. * They consist mainly of gas. No surface where you could stand on. * The have a fairly low density.


How do the densities of the inner planets compare to the outter planets?

The inner planets have much higher densities do to them being made up of solids. The large outer planets are made up mostly of gasses making them much less dense. The outer planets are larger making them attract more dust and gas.


What is the inner and outer plants and contrast the two groups of planets?

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.


Which planets have densities similar to earth?

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).


How do inner planets differ?

Inner planets differ from outer planets because they have rocky core (excepting Pluto), and the are much smaller than outer planets, which are bigger and take more time to orbit Sun than inner planets because of their location. Outer planets are farther from the Sun than inner planets.


What properties do inner planets have in common?

The inner planets have a warmer climate, are small, and are much rockier than the outer planets.


Why is Venus an inner planet?

There are four inner planets: Mercury, Venus, Earth, and Mars. There are also four outer planets: Jupiter, Saturn, Uranus, and Neptune. The inner planets are spaced much closer to each other than the outer planets. The asteroid belt separates the inner planets form the outer planets.


Are outer planets denser than smaller planets?

No. The outer planets are gas planets, which are much less dense than the inner terrestrial planets.


What is the differ from outer planets and inner planets?

1-Outer Planets are much colder then inner planets. 2-They are all Gas Giants (they are incredibly huge). 3-ALL outer planets have rings (Pluto is a dwarf planet.And is alot farther away then Neptune) 4-There gravity is ALOT stronger then the inner planets. 5-Outer planets have shorter days then inner planets (i don't know why though).


Is earth an inner or outer planet?

Earth is an inner planet. The inner planets are Mercury, Venus, Earth, and Mars. The outer planets are Jupiter, Saturn, Uranus, and Neptune. The inner planets are warmer and have solid, rocky cores. The outer planets are much cooler, bigger and are mostly, if not entirely, gas.


Compare the rotational period of the inner and outer planets?

The rotational period of the inner planets is much faster than the rotational period of the outer planets. The rotation of some planets takes years to complete.


The outer planets are much closer together than the inner planets?

No. The reverse is true.


Are the outer planets and dwarf plants much bigger than the inner planets and dwarf planets?

Yes. The four inner planets: Mercury, Venus, Earth and Mars and smaller than the four outer planets: Jupiter, Saturn, Uranus and Neptune. Earth is largest inner planet, and Neptune is the smallest outer planet. Neptune is around 14 times larger in terms of diameter than the Earth. The dwarf planets are all smaller than any of the actual planets.


How do the planets farther from the Sun differ from the planets that are closer to the Sun?

The four outer planets are gas giants - they are much larger than the four inner planets, and they consist mainly of gas - they don't have a surface on which you can stand.


What are the differences between the inner and the outer planets?

The four inner rocky planets are fairly dense, they have a solid surface and are warmer compared with the four outer gas giant planets. These are much larger, have many moons and rings, and are a lot colder. They don't have a surface, just an atmosphere that gets thicker and thicker


What receives the most energy outer or inter planets?

The inner planets do, as they are much closer to the sun.


How is Earth a inner planet?

The Solar System has two major groups of planets - the four inner planets which include Earth, and the four outer planets. Each of these groups shares certain characteristics with one another. Mainly, the outer planets are gas giant - i.e., they are much larger than Earth, and they are made up mainly of gas.


How do the distances between the inner planets compare to the distance between the outer planets?

The orbits of the four inner planets are much closer, all orbiting the sun within ¼ billion km. The outer planets are more spread out, but are much larger in size. Their distances roughly double each time as you go out from Jupiter. Average distances of inner planets from sun; Mercury, 57,909,175km Venus, 108,208,930km Earth, 149,597,890km Mars, 227,936,640km Average distances of outer planets from sun; Jupiter, 778,412,010km Saturn, 1,426,725,400km Uranus, 2,870,972,200km Neptune, 4,498,252,900km