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| physical object > natural object > particle > molecule |
| molecule comparison table | |||
| Subject | has discovery in space date | has definition | has decompostion temperature |
|---|---|---|---|
| diatomic molecule | a molecule containing only two atoms which can be of different elements | < 10000 K | |
| interstellar molecule | Molecule present in interstellar space. As of late 1974, at least 33 molecular species had been identified with reasonable certainty. | ||
| PAH | Polycyclic Aromatic Hydrocarbon |
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