noun
- Plural of coronograph; instruments or devices used to observe and photograph the sun's corona, especially during a solar eclipse or by blocking the sun's bright disk.
Usage: technical; astronomy
Examples
- Astronomers used coronographs to study the sun's outer atmosphere during the total solar eclipse.
- Modern space-based coronographs have greatly improved our understanding of solar phenomena.
- The observatory installed several coronographs to monitor coronal mass ejections.
- Coronographs allow scientists to observe the corona without waiting for a natural eclipse.