Comets

Comets are icy celestial bodies that originate from the outer regions of the solar system. They are composed mainly of water ice, frozen gases, dust, and rocky material. When a comet approaches the Sun, the heat causes the ice to vaporize, creating a glowing coma around the nucleus (the solid core) and sometimes forming a tail that points away from the Sun due to solar wind and radiation pressure.Comets are often categorized based on their orbital periods. Short-period comets have orbits that take less than 200 years to complete, while long-period comets have orbits that take more than 200 years. The most well-known comets, such as Halley's Comet, are visible from Earth at regular intervals and have made significant contributions to our understanding of the solar system.Comets are considered to be remnants from the early solar system, preserving clues about its formation and evolution. Their unpredictable appearances and spectacular displays, often visible to the naked eye, have fascinated humans for centuries, playing a role in cultural and scientific history.