noun
- Plural of geocorona; a faint halo of hydrogen atoms surrounding Earth's upper atmosphere, extending thousands of kilometers into space.
Usage: technical; astronomy; space science
Examples
- Scientists detected geocoronas around Earth using ultraviolet observations from space.
- The geocoronas extend far beyond the traditional boundary of the atmosphere.
- Multiple geocoronas have been identified around different planets in our solar system.
- Studying geocoronas helps us understand atmospheric escape and planetary evolution.