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PAH world hypothesis[edit]
Main article: PAH world hypothesis
Polycyclic aromatic hydrocarbons (PAH) are the most common and abundant of the known polyatomic molecules in the observable universe, and are considered a likely constituent of the primordial sea
[186][187][188][189] In 2010, PAHs were detected in nebulae
Green areas show regions where radiation from hot stars collided with large molecules and small dust grains called "polycyclic aromatic hydrocarbons" (PAHs), causing them to fluoresce.
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