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The masses of the gas giants are greater, which would make them larger, and their gravity can hold more massive atmospheres. Due to limits on the compressibility of atmospheric gases, these atmospheres are very deep. The lower solar heating farther from the Sun also plays a role in allowing these planets to maintain a high percentage of their lighter gases (hydrogen, helium) than the inner planets.

So, even without their atmospheres, the cores of gas giants would have greater diameters than the terrestrial planets. They are simply bigger planets.

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Q: Why are gas giants larger than terrestrial planets?
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Related questions

Why do the giants have more moons than the terrestrial planets?

They are larger and so they have more gravity.


Why do these gas giants have more moons than the terrestrial planets?

They are larger and so they have more gravity.


Why do the gas giants have more moons than the terrestrial planets?

They are larger and so they have more gravity.


Do terrestrial planets have more moons than the outer gas giants?

Terrestrial means on Earth so Earth is the only terrestrial planet This is incorrect, the first 4 planets are terrestrial as they are solidly bound planets. Pluto was also a terrestrial dwarf planet. Any planet can have moons but due to the gas giants having larger gravitational forces they have traditionally gathered more moons. Thusly, no.


Are Jupiter Saturn Neptune and Uranus bigger than terrestrial planets?

Yes, all four of those planets are larger than the terrestrial planets.


How does venus rank in the largest plants in the solar system?

Venus is the sixth-largest planet in our solar system, preceded by Earth, and proceeded by Mars. There are twelve smaller planets (ten dwarf planets, two terrestrial planets) than Venus in the system, and five larger planets (two gas giants, two ice giants, one terrestrial planet) than Venus.


How are the planets classifications as a terrestrial plaent or gas giant generally related to their densities?

Rocky planets are denser than gas giants.


Which gas giants have more moons than the terrestrial planets?

All of our Solar Systems gas giants have more moons than the terrestrial planets. Jupiter (63), Saturn (62), Uranus (27) and Neptune (13).


The most obvious difference between the terrestrial and the jovian planets is?

The size. The gaseous Jovian planets are far larger than the inner terrestrial planets.


Are other planets moons larger than terrestrial planets?

Two are: Jupiter's moon Ganymede and Saturn's moon Titan are larger than Mercury.


Why are gas planets larger than terrestrial?

The masses of the gas giants are greater, which would make them larger, and their gravity can hold more massive atmospheres. Due to limits on the compressibility of atmospheric gases, these atmospheres are very deep. The lower solar heating farther from the Sun also plays a role in allowing these planets to maintain a high percentage of their lighter gases (hydrogen, helium) than the inner planets. So, even without their atmospheres, the cores of gas giants would have greater diameters than the terrestrial planets. They are simply bigger planets.


How do the terrestrial planets differ from the Jovian planets?

The jovian planets have no solid ground just compressed gases the terrestrial planets have solid ground. The Jovian planets are named gas giants because they are farther then the sun and are not solid and the terrestrial planets are closer to the sun and do not have as much gases.