Interstellar molecules.
D000641:Ammonia / Q000032:analysis; D055580:Astronomical Phenomena; D001256:Astronomy; D055598:Chemical Phenomena; D002621:Chemistry; D005557:Formaldehyde / Q000032:analysis; D005609:Free Radicals; D005740:Gases; D006859:Hydrogen / Q000032:analysis; D007700:Kinetics; D008280:Magnetics; D008433:Mathematics; D010781:Photography; D013696:Temperature; D013816:Thermodynamics; D014466:Ultraviolet Rays; D014867:Water / Q000032:analysis; D014965:X-Rays
D005609:Free Radicals; D005740:Gases; D014867:Water; D005557:Formaldehyde; D000641:Ammonia; D006859:Hydrogen