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nebula colorful bright universe space celestial body nature beautiful spectacular fantasy mystery vast infinite eternal exploration discovery mystery unknown science astronomy physics natural science cosmology astronomy galaxy star planet black hole white dwarf neutron star supernova gamma-ray burst quasar active galactic nucleus radio galaxy interstellar matter interstellar dust interstellar gas molecular cloud molecular hydrogen cloud carbon monoxide molecular cloud formaldehyde molecular cloud acetonitrile molecular cloud hydrogen cyanide molecular cloud water molecular cloud ammonia molecular cloud methanol molecular cloud ethanol molecular cloud acetone molecular cloud diethyl ether molecular cloud acetic acid molecular cloud formic acid molecular cloud acetic acid molecular cloud propionic acid molecular cloud butyric acid molecular cloud valeric acid molecular cloud hexanoic acid molecular cloud heptanoic acid molecular cloud octanoic acid molecular cloud nonanoic acid molecular cloud decanoic acid molecular cloud undecanoic acid molecular cloud dodecanoic acid molecular cloud tridecanoic acid molecular cloud tetradecanoic acid molecular cloud pentadecanoic acid molecular cloud hexadecanoic acid molecular cloud heptadecanoic acid molecular cloud octadecanoic acid molecular cloud nonadecanoic acid molecular cloud eicosanoic acid molecular cloud