noun
- a faint luminous phenomenon in the upper atmosphere caused by chemical reactions involving oxygen and other gases
Usage: atmospheric science
Examples
- Scientists study airglow to understand atmospheric chemistry.
- The airglow is too faint to see with the naked eye during the day.
- Specialized instruments can detect airglow emissions from space.
- Airglow occurs continuously in the Earth’s upper atmosphere.
- The green airglow comes from excited oxygen atoms.
- Researchers use airglow measurements to monitor atmospheric conditions.