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:
“Virtue is the adherence in action to the nature of things, and the nature of things makes it prevalent. It consists in a perpetual substitution of being for seeming, and with sublime propriety God is described as saying, I A—.”
—Ralph Waldo Emerson (1803–1882)
“It is an agreeable change to cross a lake, after you have been shut up in the woods, not only on account of the greater expanse of water, but also of sky. It is one of the surprises which Nature has in store for the traveler in the forest. To look down, in this case, over eighteen miles of water, was liberating and civilizing even.”
—Henry David Thoreau (1817–1862)