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    Question ID:   12540         Current Version: 1
Question: What are the amount of atmosphere and atmospheric composition of the planets in our solar system?
Category: Science > Astronomy & Space
Keywords: planet, solar system, air, amount, atmosphere, atmospheric composition
Type: what
Rating:(0 ratings)    Views: 100    Discussions: 0   In Watch Lists: 1  

 
    Answer:

Following table shows the amount of atmosphere and atmospheric composition of the planets in our solar system:

Planet Amount of Atmosphere Atmospheric Composition
Mercury Trace atmosphere = .000000000000010 bars 42% oxygen (O2)
29% sodium (Na)
22% hydrogen (H2)
6% helium (He)
0.5% potassium (K)
possible trace amounts of: argon (Ar), carbon dioxide (CO2), water (H2O), nitrogen (N2), xenon (Xe), krypton (Kr), neon (Ne)
Venus Atmosphere = 92 bars 96.5% carbon dioxide (CO2)
3.5% nitrogen (N2)
water (H2O) - 0.0020%
trace amounts of: sulfur dioxide (SO2), argon (Ar), carbon monoxide (CO), helium (He) and neon (Ne)
Earth 1 bar (at sea level) 78% nitrogen (N2)
21% oxygen (O2)
0.035% carbon dioxide (CO2)
1 to 4% water vapor (H2O)
300 Dobson Units ozone (O3)
0.002% methane (CH4)
0.9% argon (Ar)
trace amounts of: helium (He), krypton (Kr) and hydrogen (H2)
Moon 0 bars None
Mars Atmosphere = 0.0061 bars 95.32 carbon dioxide (CO2)
2.7% nitrogen (N2)
1.6% argon (Ar)
0.13% oxygen (O2)
0.08% carbon monoxide (CO)
water (H2O) - 0.0210%
trace amounts of: nitrogen oxide (NO), neon (Ne), hydrogen-deuterium-oxygen(HDC), krypton (Kr) and xenon (Xe)
Jupiter Atmosphere > 1000 bars 89.8% hydrogen (H2)
10.2% helium (He)
0.3% methane (CH4)
~0.0004% water (H2O) (varies with pressure)
trace amounts of: ammonia (NH3), hydrogen deuteride (HD) and ethane (C2H6)
Saturn Atmosphere > 1000 bars 96.3% hydrogen (H2)
3.25% helium (He)
0.45% methane (CH4)
trace amounts of: ammonia (NH3), hydrogen deuteride (HD) and ethane (C2H6)
Uranus Atmosphere > 1000 bars 82.5% hydrogen (H2)
15.2% helium (He)
~2.3% methane (CH4)
trace amounts of: hydrogen deuteride (HD)
Neptune Atmosphere > 1000 bars 80.0% hydrogen (H2)
19.0% helium (He)
1.5% methane (CH4)
trace amount of: hydrogen deuteride (HD) and ethane (C2H6)
Pluto Atmosphere ~ 0.000003 bars Methane (CH4), nitrogen (N2)

* 1 bar is the average atmospheric pressure at sea level on Earth. 

Source: NASA

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