noun
- celestial objects made of ice, dust, and rock that orbit the sun and develop a glowing tail when approaching it
Usage: plural of comet
Examples
- Comets are often called dirty snowballs by astronomers.
- Halley’s Comet is one of the most famous comets visible from Earth.
- Ancient civilizations often viewed comets as omens or signs.
- The telescope revealed several comets in the outer solar system.
- Comets leave trails of debris that create meteor showers.
- Scientists study comets to learn about the early solar system.