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:
“There is much in nature against us. But we forget:
Take nature altogether since time began,
Including human nature, in peace and war,
And it must be a little more in favor of man....”
—Robert Frost (1874–1963)
“That only needs a finger touch from God
To spring it like a deadfall and the fault
In nature would wipe out all human fault.”
—Robert Frost (1874–1963)