urajärjestelmien
Urajärjestelmien, meaning "planetary systems" in Finnish, refers to the arrangement and dynamics of celestial bodies orbiting a star. This encompasses not just planets but also dwarf planets, asteroids, comets, and any other matter gravitationally bound to the central star. The study of urajärjestelmien, or planetary systems, is a fundamental aspect of astrophysics and astronomy.
The formation of urajärjestelmien is believed to begin with the gravitational collapse of a large cloud of
Our own solar system is an example of an urajärjestelmien, consisting of the Sun and eight planets,