A galaxy contains planets and a star system contains only stars.
A star is one, a galaxy is many.
A solar system is a single star in this case the SunA galaxy is an area in the universeA universe is every thing.
Solar System: The sun with the celestial bodies that revolve around it in its gravitational field. Galaxy: A collection of star systems; any of the billions of systems each having many stars and nebulae and dust.
A single star and its planets - a solar system - are a tiny part of a galaxy. It is like one cell from your body.
A galaxy is a collection of billions of stars. The brighter of these may show up separately, if sufficiently magnified.
The Galaxy, also call the Milky Way, is made of stars. Other, distant star systems are called galaxies (lower case g) by analogy.
Universe, galaxy,nebula,solar system, star, planet
In a solar system you find a few planets orbiting a star. In a galaxy you find billions of stars orbiting a galactic nucleus (probably a super massive black hole).
Our solar system is in a galaxy called the Milky Way. There are pulsars in our galaxy, but not in our solar system.
Universe -> galaxy -> star -> planet
The word "solar" comes from the Latin meaning sun, therefore a solar system involves a sun ie a star. The term "solar system" commonly refers to a star with planets in orbit around it, although it could technically be applied to binary or triple star systems. The important point is that the word "system" implies a star with at least one other body. A galaxy, however, is another beast altogether. A galaxy consists of hundreds of billions of stars, all of which are potential solar systems. And there are billions of known galaxies.....certainly a humbling thought!
The milky way is where there is a lot of stars at each end of the galaxy And a star is a matter mostly of gas pressured together