火星(かせい)

かせい
noun
Mars (planet)
scienceproper-noun
1. Mars (planet)
The fourth planet from the Sun, known for its reddish appearance. Named with the characters for "fire" and "star" due to its red color.
火星(かせい)は赤(あか)く見(み)える。
Mars appears red.
火星(かせい)に水(みず)があるかどうかの研究(けんきゅう)が進(すす)んでいる。
Research into whether there is water on Mars is progressing.
いつか人類(じんるい)が火星(かせい)に移住(いじゅう)する時代(じだい)が来(く)るかもしれない。
The day may come when humanity migrates to Mars.

Writing

火(か) (fire) + 星(せい) (star/planet). The name reflects the planet's reddish color, which the ancients associated with fire. This naming convention comes from the Chinese five-element system (五行(ごぎょう)).

Related words

All planets in the solar system are named using the five-element system or descriptions:

Common collocations

Related Words

Related: 木星(もくせい) (Jupiter (planet))
Related: 惑星(わくせい) (planet)
Related: 水星(すいせい) (Mercury)
Related: 金星(きんせい) (Venus)
Related: 土星(どせい) (Saturn)
general
Added 2026.2.24 20:39 · Revised 2026.10.15 22:26
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