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what is the meaning of comet?​

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A comet is a small celestial body that orbits the Sun and is composed primarily of ice, dust, and rocky material. When a comet comes close to the Sun, it heats up and releases gases, creating a visible atmosphere called a coma, and sometimes a tail.

Characteristics of Comet

  • Nucleus - The core of a comet, called the nucleus, is composed of ice, dust, and rocky material. It's typically a few kilometers in diameter and remains frozen and inactive when far from the Sun.
  • Coma - As the comet approaches the Sun, the heat causes the ices in the nucleus to sublimate (turn directly from solid to gas), creating a glowing halo of gas and dust around the nucleus known as the coma. This coma can be thousands of kilometers across.
  • Tail - Solar radiation and the solar wind cause the coma to form one or more tails that always point away from the Sun. There are generally two types of tails: a dust tail, which is curved and reflects sunlight, and an ion tail, which is straight and glows due to ionized gases.