(element, O, atomic number 8)
Oxygen (O) is the element
with atomic number 8, symbol O.
Its usual isotope has mass number 16,
but 17 and 18 are also stable.
It is the third most common element.
The Milky Way is about 1% oxygen by mass.
It results from CNO cycle and neon burning.
asymptotic giant branch (AGB)
carbon monoxide (CO)
carbon dioxide (CO2)
energetic neutral atom (ENA)
ionization correction factor (ICF)
triple alpha process
Type Ia supernova