Until 2006, there were 9 planets in the solar system: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptup, Pluto. In 2006, it was decided to exclude Pluto from this list, after which Pluto was considered a dwarf planet.
Mercury, Venus, Earth, Mars belong to the terrestrial planets, the rest are gas giants. Of all the planets in the solar system, intelligent life is present only on Earth.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.