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Because they are close together to the sun, compared to the other planets in the solar system.

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Q: Why are the first four planets called inner planets?
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What are the four planets closest to the suns called?

The four planets closest to the sun are called the inner planets. They are Mercury, Venus, Earth, and Mars. The asteroid belt lies between the inner and outer planets.


Which is the inner planet?

There are four planets called the "inner planets".Of those, Mercury is the innermost planet.From the sun the planets areMercuryVenusEarthMarsJupiterSaturnUranusNeptunePluto


Which planets are called inner planets and which are called outer planets?

The first four planets (Mercury, Venus, Earth, and Mars) are the inner planets, because they are rocky and on the inside of the asteroid belt, and the next four planets (Jupiter, Saturn, Uranus, and Neptune) are the outer planets because they are light and composed of gas, and are on the outside of the asteroid belt.


The four inner planets are made of rock what are they called?

The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars.


What are they called the four planets closer to the sun?

"The Inner Planets" is the common term for the four planets closest to our sun.


What kind of planets are the first four inner?

Mercury, Venus, Earth, and Mars are the first four inner planets. The asteroid belt is what separates the inner and outer planets from each other. There are thousands of asteroids in the asteroid belt.


What are the inner planets somethimes called?

The four inner planets, Mercury, Venus, Earth, and Mars, are also known as the rocky planets.


Are all inner planets called gas giants?

No that's what the four outer planets are called.


Are the first four inner planets gas giants?

No.


Why are the first four planets called the inner planets and the remaining planets called the outer planets?

Because we have eight planets.Four are closer which are called inner planets.Their names are mercury,venus,earth and mars.Four are too back.They are called outer planets.Their names are jupiter,saturn,uranus and neptune.


Which of the eight major planets are called the inner planets?

The first four planets are often lumped together into the category of "inner" or "terrestrial" planets:MercuryVenusEarthMarsThe last four are often lumped together into the category of "outer" or "gas giant" planets:JupiterSaturnUranusNeptuneAll of the dwarf planets are terrestrial. The only dwarf planet that can sometimes be called an "inner planet" is Ceres, which orbits between Mars and Jupiter.


What are inner planets and sometimes what are they called?

There are four planets in our solar system considered 'inner planets': Mercury, Venus, Earth, and Mars. These four also belong to the classification "terrestrial planets." Three of them (Venus, Earth, and Mars) are in the habitable zone, a zone in every system in which life can live, under the right conditions.