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:
“Man is fallen; nature is erect, and serves as a differential thermometer, detecting the presence or absence of the divine sentiment in man.”
—Ralph Waldo Emerson (1803–1882)
“True wit is Nature to advantage dressed,
What oft was thought, but ne’er so well expressed;
Something whose truth convinced at sight we find,
That gives us back the image of our mind.”
—Alexander Pope (1688–1744)