We don't have an accurate overview of all the stars in the Milky Way - even the total number of stars may be anything between approximately 200 billion and 400 billion. However, many stars are part of double or multiple system, so we can be fairly sure there are millions of triple stars, just in our own galaxy.
90%.
Scientists estimate that there are around 58 billion star systems in our Galaxy.
A triple star system.
Yes. It's impossible to list all 180 billion star systems in the Star Wars galaxy.
If you counted 1 number per second, it would take 5700 years to count all 180 billion star systems in the Star Wars galaxy.
The Star Wars galaxy literally contains millions of inhabited systems.
A star is one, a galaxy is many.
Planetary systems, star clusters, galaxy groups, galaxies, galaxy clusters, superclusters in order from smallest to largest.
Galaxy! A galaxy contists of billions of star systems .. A nebulea on the other hand just contains the raw ingredients to make a star in a very dense cloud.
Polaris (the North star - Alpha Ursae Minoris) is a triple star system, but appears to us as a single star. Alpha Centauri is also another triple star system. And there are many more.
It is not impossible and many stars are part of a double or triple star systems. However, apart from those cases, the chances of two "independent" stars coming close together are small. It's all to do with the complicated mathematics of gravitation and the motion if stars in the Galaxy. The main reason is probably the typically huge distances between stars (or star systems) in the Galaxy. In fact, there was a theory (many decades ago) that a star passing close to the Sun could have been the cause of planet formation in the Solar System. However, it was shown to be an extremely unlikely event.
There are billions of planets and moons in the Star Wars galaxy.