Comet

A celestial object consisting of a nucleus of ice and dust, and, when near the sun, a “coma” (or atmosphere) and a tail.

The nucleus is a relatively small, solid body, composed mainly of frozen gases such as methane, ammonia, and water, mixed with dust particles.

As a comet approaches the sun, the heat causes these ices to sublimate, forming a glowing coma around the nucleus and a tail that always points away from the sun due to solar wind pressure and radiation.

Comets are remnants from the early solar system and offer clues about its formation. .

Comet meaning with examples

• The astronomer pointed out the stunning sight of the Hale-Bopp comet in the night sky. Its bright, elongated tail was a spectacle, a natural light show that captivated everyone observing. It was an unforgettable experience to see such a celestial wonder.
• Ancient civilizations often viewed the sudden appearance of a comet as a harbinger of significant events. They didn't have the scientific understanding to appreciate its orbit, they often believed it foreshadowed disasters.
• Scientists study the composition of **comets** to understand the origins of the solar system and the building blocks of life. Their icy interiors are like time capsules, holding information that stretches back billions of years.
• The comet's trajectory took it on a long, looping orbit around the sun. This was a rare occurrence and one many were excited to see it so clearly.
• The impact of the comet could have led to mass extinctions in Earth's past. The study of craters gives scientists more information about such significant impacts.