Aurinkojärjestelmässä

Aurinkojärjestelmässä is a Finnish term that translates to "in the solar system" or "within the solar system." It refers to the celestial bodies, phenomena, and processes that exist within the gravitational influence of the Sun. Our solar system consists of the Sun itself, which is the central star, and everything that orbits it. This includes eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune.

Beyond the planets, the solar system is populated by numerous other objects. These include dwarf planets such as Pluto, Ceres, and Eris, which are large enough to be rounded by their own gravity but have not cleared their orbital neighborhood of other objects. There are also vast numbers of asteroids, primarily located in the asteroid belt between Mars and Jupiter, and comets, which are icy bodies originating from the outer reaches of the solar system, often found in the Kuiper Belt and the Oort Cloud. Moons, which orbit planets and dwarf planets, are also integral parts of the solar system.

The space between these celestial bodies is not empty but is filled with a tenuous medium known as the interplanetary medium, composed of dust, gas, and charged particles emanating from the Sun, called the solar wind. Aurinkojärjestelmässä encompasses all these components and their interactions, forming a complex and dynamic cosmic environment. The study of aurinkojärjestelmässä is a fundamental aspect of astronomy and planetary science, seeking to understand the formation, evolution, and current state of our celestial home.