The inner planets are all terrestrial - they are "rocky". The outer planets are gas giants.
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Inner planets, or terrestrial planets, are characterized by their solid rocky surfaces and close proximity to the sun. They tend to have thin atmospheres and lack the presence of rings or many natural satellites.
The inner planets (Mercury, Venus, Earth, Mars) have more in common with each other compared to the outer planets (Jupiter, Saturn, Uranus, Neptune). The inner planets are often referred to as terrestrial planets and are characterized by their solid surfaces and relatively small sizes, while the outer planets are gas giants with no solid surface and much larger sizes.
The inner planets, also known as terrestrial planets, have solid rocky surfaces. This distinguishes them from the outer gas giant planets in our solar system. Additionally, they are closer to the Sun compared to the outer planets.
the inner planets are sometimes called Terrestrial Planets
I hesitate to admit that I was raised on one of the inner planets. The inner planets are not gaseous, like the outer planets.
They are all compact objects with rocky, accessible surfaces.