In Nature
Most interstellar hydrogen is in the form of atomic hydrogen because the atoms can seldom collide and combine. They are the source of the important 21 cm hydrogen line in astronomy at 1420 MHz.
Read more about this topic: Nascent Hydrogen
Famous quotes containing the word nature:
“In the domain of Political Economy, free scientific inquiry meets not merely the same enemies as in all other domains. The peculiar nature of the material it deals with, summons as foes into the field of battle the most violent, mean and malignant passions of the human breast, the Furies of private interest.”
—Karl Marx (1818–1883)
“Away profane philosopher! seekest thou in nature the cause? This refers to that, and that to the next, and the next to the third, and everything refers. Thou must ask in another mood, thou must feel it and love it, thou must behold it in a spirit as grand as that by which it exists, ere thou canst know the law. Known it will not be, but gladly beloved and enjoyed.”
—Ralph Waldo Emerson (1803–1882)