As the comet approaches the Sun, the core heats up, and its substances begin to evaporate. A gas shell forms around the core, and then a long tail appears. It is always directed away from the Sun and consists of gases and fine dust. When a comet moves away from the Sun, its tail and gas shell gradually disappear. Over time, under the influence of solar heat, many comets are completely destroyed. Their particles are scattered in outer space.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.