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The solar system consists of the Sun and the celestial objects that are gravitationally bound to it, such as planets, moons, comets, and asteroids. The Sun, a yellow dwarf star, is at the center of the solar system and contains 99.8% of its total mass. The four inner planets, Mercury, Venus, Earth, and Mars, are often referred to as the terrestrial planets, as they are primarily composed of rock and metal. The outer planets, Jupiter, Saturn, Uranus, and Neptune, are known as gas giants due to their massive atmospheres of hydrogen and helium.
In addition to the eight planets, there are also five officially recognized dwarf planets in the solar system: Pluto, Eris, Haumea, Makemake, and Ceres. These celestial bodies are similar to planets in that they orbit the Sun and are spherical in shape, but they have not cleared their orbits of other debris and are therefore classified differently.
The largest and most massive body in the solar system is the Sun, which accounts for about 99.8% of the total mass. Its immense gravitational pull keeps all the planets and other celestial objects in orbit around it. The four inner planets, also known as the terrestrial planets, are the closest to the Sun and have solid, rocky surfaces. The outer planets, on the other hand, are much larger and primarily composed of gas.
Beyond the orbit of Neptune lies the Kuiper Belt, a region of the solar system containing many small icy bodies, including Pluto and several other dwarf planets. The Oort Cloud, a hypothetical spherical cloud of icy bodies, is thought to be the source of long-period comets that occasionally pass through the inner solar system.
The solar system is a fascinating and diverse collection of celestial objects, each with its own unique characteristics and features. Studying and exploring the solar system not only provides valuable scientific insights but also inspires wonder and awe at the vastness and complexity of the universe.
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