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:
“Our ancestors ... possessed a right, which nature has given to all men, of departing from the country in which chance, not choice has placed them.”
—Thomas Jefferson (1743–1826)
“The final upshot of thinking is the exercise of volition, and of this thought no longer forms a part; but belief is only a stadium of mental action, an effect upon our nature due to thought, which will influence future thinking.”
—Charles Sanders Peirce (1839–1914)