noun
- 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 the geocorona using ultraviolet observations from space probes.
- The geocorona extends far beyond the traditional boundary of Earth's atmosphere.
- Hydrogen atoms in the geocorona are ionized by solar radiation.
- The geocorona was first identified through spectroscopic analysis in the 1970s.
- Understanding the geocorona helps researchers study Earth's interaction with the solar wind.