ESA Science & Technology04-Jul-2005 06:31:11
 

Atmosphere

Last Update:  15 Feb 2005

Visibile light cannot escape from the veil of orange smog that covers Titan's surface. The moon's dry cold atmosphere causes a 300 km thick layer of smog to build up. The smog, just like on Earth, forms when sunlight interacts with hydrocarbon molecules.

Molecule Symbol

Amount

Major Constituents  

Percent

Nitrogen N2

87-99

Argon Ar

0-6

Methane CH4

1-6

Minor  Constituents   parts per million
Hydrogen H2

2000

Hydrocarbons

Ethane

C2H6

20

Acetylene

C2H2

4

Ethylene

C2H4

1

Propane

C3H8

1

Methylacetylene

C3H4

0.03

Diacetylene

C4H2

0.02

Nitrogen Compounds

Hydrogen Cyanide

HCN

1

Cynaogen

C2N2

0.02

Cyanoacetylene

HC3N

0.03

Acteonitrile

CH3CN

0.003

Oxygen Compounds

Carbon Monoxide

CO

50

Carbon Dioxide

CO2

0.01

Table indicating the primary constituents of Titan's atmosphere



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