noun
Earth Similarity Index; ESI
A scientific measure used in astrobiology to rate how similar a planet is to Earth.
地球類似性指標は、惑星が地球にどれだけ似ているかを示す数値です。
The Earth Similarity Index is a number that shows how similar a planet is to Earth.
A compound of 地球 (Earth), 類似性 (similarity), and 指標 (index), directly translating the English term 'Earth Similarity Index'.