There is no “Inner” and “Outer” solar system with a hard defined boundary. Generally the solar system is divided into the rocky planets (which ends at Mars), the gas giants (which starts at Jupiter), and the Kuiper Belt (which is all of the objects beyond the orbit of Neptune).

So you would just say the asteroid belt is the region of space between the rocky planets and the gas giants, or between Mars and Jupiter. There is no real agreement in what the “inner” and “outer” solar system is or if they are even fair classifications. Especially now that the Kuiper Belt is so frequently referred to as the outer solar system by laymen.

The inner Solar System includes the four terrestrial planets and the asteroid belt. The outer Solar System is beyond the asteroids, including the four giant planets. Since the discovery of the Kuiper belt, the outermost parts of the Solar System are considered a distinct region consisting of the objects beyond Neptune.

From Google not my words but hope it helps

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I only found this one result on google that mentioned this. Hence why I thought I’d ask here. Thanks 😊

Thank you! 😊

Found a few, worth reading more into it if ur interested. I googled inner solar system vs outer

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