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:
“Since everything in nature answers to a moral power, if any phenomenon remains brute and dark, it is that the corresponding faculty in the observer is not yet active.”
—Ralph Waldo Emerson (1803–1882)
“In the end, nature is inexorable: it has no reason to hurry and, sooner or later, it takes what belongs to it. Unconsciously and inflexibly obedient to its own laws, it doesn’t know art, just as it doesn’t know freedom, just as it doesn’t know goodness.”
—Ivan Sergeevich Turgenev (1818–1883)