Definition: A "major planet" is a noun used in astronomy to refer to any of the large celestial bodies in our solar system that orbit the Sun. These planets are visible from Earth and shine because they reflect sunlight. The major planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and, historically, Pluto (though Pluto is now classified as a "dwarf planet").
You can use "major planet" when talking about the solar system and the different planets that exist. It is important to note that there are eight major planets recognized today (Pluto is not considered a major planet anymore).
In more advanced discussions, you might hear about the characteristics of major planets, such as their atmospheres, surfaces, and orbits. For example: - "Jupiter is the largest major planet and has a strong magnetic field."
While there are no specific idioms or phrasal verbs directly related to "major planet," you might encounter phrases that involve the word "major," such as: - "Major in" – This means to specialize in a subject at a school (e.g., "I decided to major in astronomy.").
"Major planet" refers specifically to the large planets in our solar system that orbit the Sun and reflect light. You can use this term when discussing astronomy and the structure of our solar system.