An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

The faint ever-present glow in the → night time → sky caused by the → collision of → atoms and → molecules in Earth's → upper atmosphere with high energy → particles and → radiation, mainly from the → Sun. The airglow, also called nightglow, varies with time of night, → latitude, and → season.

→ air; → glow; → night.