English Dictionary

major planet

名詞

(astronomy) Any of the 8 celestial bodies which orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune (a celestial body that fits the 2006 IAU definition of planet).

日本語の意味

太陽を中心に公転する8つの主要な惑星（すなわち、水星、金星、地球、火星、木星、土星、天王星、海王星）

Mars, often considered a major planet, has fascinated astronomers for centuries.

火星はしばしば太陽の周りを回る8つの惑星の一つと考えられ、何世紀にもわたって天文学者を魅了してきた。

意味（1）

(astronomy) Any of the 8 celestial bodies which orbit the Sun: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune (a celestial body that fits the 2006 IAU definition of planet).

意味（2）

(astronomy) Any planet that is significantly larger and more massive than Earth, containing large amounts of hydrogen and helium, such as Jupiter and Neptune.

major planets （ plural ）