Gas species identified in comets:
[discovered in Hale-Bopp in red]
H2O, HDO, OH, O, H, H2O+, H3O+ , O+
CO, CO2, CO+, HCO+, C
H2S, SO, SO2, H2CS, OCS, CS
CH3OH, H2CO, HCOOH, CH3OCHO
HCN, DCN, CH3CN, HNC, HC3N
HNCO, CN, NH3, NH2, NH2CHO, NH
CH4, C2H2, C2H6, C3, C2, Na, K
H15CN, C34S
Gaseous
Species
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