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:
“A fine woman shews her charms to most advantage when she seems most to conceal them. The finest bosom in nature is not so fine as what imagination forms.”
—Dr. Gregory (18th century)
“As yesterday and the historical ages are past, as the work of today is present, so some flitting perspectives and demi-experiences of the life that is in nature are in time veritably future, or rather outside of time, perennial, young, divine, in the wind and rain which never die.”
—Henry David Thoreau (1817–1862)