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.
The four inner planets are also known as the terrestrial planets (or the `rocky` planets). These are; Mercury, Venus, Earth and Mars.
Mars and Earth are both rocky or "terrestrial" planets. Mars and Earth also belong to the group of inner planets (along with Venus and Mercury). Inner planets are in front of the meteor belt (between Mars and Jupiter), outer planets are behind the meteor belt.
The inner system is Mercury, Venus, Earth and Mars. The inner system is all rocky planets because gas giants like Jupiter will "Melt" under that kind of temperature.
Because the four inner planets are more rocky than gaseous, while the "gas giant" planets may or may not have any kind of a rocky core. And the word "terra" means earth or rock. So, "terrestrial".
Because when they are close to the sun first of all they are are smaller so if they had a moon the moon would have to be kinda small. And also the planets close to the sun are made to be able to get to high temperatures. Earth can't get satellites to Mercury and a moon is related to the satellites and the moon would burn up in the heat. All mass has gravity. The inner planets cannot "hang on" to their moons due to their lack of mass, therefore they are unable to overcome the suns gravitational affect on the moons which would pull them into the sun. The outer planets can "hang on" to their moons and attract more because of their mass (therefore gravity). The distance from the sun has less of an impact on these moons, therefore, the sun cannot pull any of the moons away from the outer planets. Also, the outer planets are "kind of" moon magnets due to their gravitational pull.
Dwarf Planets.
well the gasses in planets are hydrogen,methane and helium
Inner beauty is beauty within yourself. A nice kind-hearted person has inner beauty.
Small planets with no weather.
SPIRAL
Saturn, Jupiter, Uranus, and Neptune are the outer planets and are also gas giant planets.
Loudmouth