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:
“It is enough if Homer but say the sun sets. He is as serene as nature, and we can hardly detect the enthusiasm of the bard. It is as if nature spoke.”
—Henry David Thoreau (1817–1862)
“O, reason not the need! our basest beggars
Are in the poorest thing superfluous.
Allow not nature more than nature needs,
Man’s life is cheap as beast’s.”
—William Shakespeare (1564–1616)