tähtisysteemit

Tähtisysteemit, also known as star systems, are gravitationally bound collections of stars and other celestial bodies. These systems are the fundamental building blocks of galaxies. At the heart of most star systems lies one or more stars, which are massive, luminous spheres of plasma held together by their own gravity. Around these stars, planets, dwarf planets, asteroids, comets, and dust can orbit. The gravitational influence of the central star(s) dictates the motion and stability of the other objects within the system.

The most common type of star system is a single-star system, like our own Solar System, where a single star is orbited by planets. However, binary star systems, consisting of two stars orbiting a common center of mass, are also very prevalent in the universe. More complex systems with three or more stars, known as multiple star systems, exist but are less common. The number of stars and the types of celestial bodies within a star system can vary greatly, leading to a vast diversity of configurations observed across the cosmos. Studying these systems helps astronomers understand stellar evolution, planetary formation, and the dynamics of the universe.