The inner planets are in the direction of the solar and are smaller and rockier. The outer planets are similarly away, larger, and made up usually of gas. The internal planets (so as of distance from the sun, closest to furthest) are Mercury, Venus, Earth, and Mars.
Why are the inner and outer planets so exceptional?
The temperature of the early solar machine explains why the internal planets are rocky and the outer ones are gaseous. as the gases coalesced to shape a protosun, the temperature within the solar system rose. inside the inner solar system, temperatures had been as high as 2000 ok, while in the outer solar gadget it was as cool as 50 ok.
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