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Pluto: 90% Nitrogen, 9% Carbon-Monoxide and 1% Methane Neptune: 74% Hydrogen, 25% Helium and 1% Methane Uranus: 83% Hydrogen, 15% Helium and 2% Methane Saturn: 97% Hydrogen, 3% and 0.05% Methane Jupiter: 90% Hydrogen, 10% Helium and 0.07% Methane Mars: 95% Carbon-Dioxide, 3% Nitrogen and 1.6% Argon Earth: 78% Nitrogen, 21% Oxygen, 0.9% Argon and 0.03% Carbon-Dioxide Venus: 96% Carbon-Dioxide, 4% Nitrogen and 0.02% Water-Vapor Mercury: 80% Hydrogen and 20% Helium

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