Un planeta is a celestial body that orbits a star, such as our Sun. Planets are large enough to be rounded by their own gravity and have cleared their orbits of other debris. They can be classified into two main types: terrestrial planets, which are rocky, and gas giants, which are mostly composed of gases. In our Solar System, there are eight recognized planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Each planet has unique characteristics, such as size, composition, and atmosphere, making them fascinating subjects of study in astronomy.