noun
- a faint glow in the night sky visible opposite the sun, caused by sunlight reflected from interplanetary dust particles
Usage: astronomy
Examples
- The gegenschein is best observed on moonless nights away from city lights.
- Astronomers study the gegenschein to learn about dust in the solar system.
- The counterglow, or gegenschein, appears as a dim oval patch in the sky.
- Photographers often struggle to capture the faint gegenschein phenomenon.
- The gegenschein is most visible during autumn and spring months.
- Scientists use the gegenschein to map interplanetary dust distribution.