* Composition: Inner planets primarily composed of rock and metal due to their proximity to the sun and intense heat

* Atmosphere:

* Mercury: Extremely thin atmosphere composed mainly of oxygen, sodium, and potassium

*Venus: Thick atmosphere (97% carbon dioxide) with high surface pressure and temperature due to a runaway greenhouse effect

* Earth: Nitrogen-rich atmosphere with oxygen and trace gases, supporting life and regulating climate

* Mars: Thin atmosphere (95% carbon dioxide) with low surface pressure and a dusty environment

Outer Planets (Jupiter, Saturn, Uranus, Neptune)

* Composition: Predominantly made up of gas and ice due to their distance from the sun and lower temperatures.

* Atmosphere:

* Jupiter: Massive hydrogen-helium atmosphere, with bands and storms like the Great Red Spot. Contains trace gases like methane and ammonia.

* Saturn: Similar to Jupiter's composition but with a prominent ring system.

* Uranus: Unique atmosphere containing mostly hydrogen and helium but also significant amounts of methane, giving it a blue appearance.

* Neptune: Atmosphere dominated by hydrogen and helium with a noticeable blue coloration due to methane absorption.

Key differences:

* Composition: Inner planets are rocky, while outer planets are gaseous and icy

* Atmosphere Thickness: Inner planets generally have thinner atmospheres, while outer planets have thick, gaseous atmosphere.

* Greenhouse Effect: Inner planets like Venus have a strong greenhouse effect due to carbon dioxide, while outer planets have less pronounced greenhouse effects.

* Temperature and Pressure: Outer planets are generally colder with lower temperatures and pressures compared to inner planets

* Cloud Formation: Outer planets often have complex and dynamic cloud formations due to their composition atmosphere conditions