Solar System consist of 9 planet they are, Mars, Venus, Earth, Mars, Jupiter, Saturn, Neptune, Uranus and Pluto (dwarf planet).
Galaxy is a group of billion of star, there are approximately 130 billion galaxies in our universe about 100 billion (and more) stars in every galaxy. we can see about 3,000 star at the average.
the earth's belong to earth's galaxy which is the milky way, and the sun.
