Because they are roughly like the Earth.
terrestial planets
the inner planets are terrestial and outer planet like Jupiter, Neptune etc are gas planet.
The four inner, rocky planets are also known as the terrestrial planets. These are; Mercury, Venus, Earth and Mars.
Inner planets are also known as Terrestial planets which means they all have a rocky surface.
There are 7 main classification of Planets. They are classified into the following groups; * Inferior Planets * Superior Planets * Inner Planets * Outer Planets * Terrestial Planets, * Jovian Planets * Gas Giants
That's because they are beyond the asteroid belt which means they are already far from the sun, unlike the inner planets (also known as terrestial planets).
terrestrial are planets that are the inner planets since there are made up of rock. but on the other hand. the outer planets are the gas giants. or the outer planets. they are made up of various gasses.
the inner planets are sometimes called Terrestrial Planets
The first four planets closest to the Sun are the four terrestial planets.
Of the inner four terrestrial planets in our solar system - Mercury, Venus, Earth and Mars - Mercury has almost no atmosphere.
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).
no the inner planets are called "inner" planets bcuz there closer