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:
“A work of art is an abstract or epitome of the world. It is the result or expression of nature, in miniature. For, although the works of nature are innumerable and all different, the result or the expression of them all is similar and single.”
—Ralph Waldo Emerson (1803–1882)
“In nature there are unexpected storms; in life there are unpredictable vicissitudes.”
—Chinese proverb.