Why do the eight planets in our solar system have different sizes and compositions?

Answer 1

The eight planets in our solar system have different sizes and compositions primarily due to their formation processes and their positions within the protoplanetary disk. Inner planets, like Earth and Mars, formed closer to the Sun where it was too warm for gases to condense, resulting in rocky compositions. In contrast, the outer planets, such as Jupiter and Saturn, formed farther away where cooler temperatures allowed for the accumulation of gas and ices, leading to their larger sizes and gaseous compositions. Additionally, variations in available materials and gravitational influences during the early solar system contributed to these differences.