恒こう星せい

こ

う

せ

い

Common wordFreq.FrequencyTop 50,000

Meanings

1

noun

fixed star; star

astronomy

Astronomical term for a star that emits its own light, as opposed to planets (惑星). In everyday language, 星 is more common.

太たい陽ようは恒こう星せいの一ひとつ

です

。

The sun is one of the fixed stars.

夜よ空ぞらに見みえる星ほしのほとんどは恒こう星せいだ。

Most of the stars visible in the night sky are fixed stars.

Usage patterns

〈恒こう星せい〉が輝かがやくa fixed star shines/glows
夜よ空ぞらには無む数すうの恒こう星せいが輝かがやいている。
Countless fixed stars are shining in the night sky.
〈恒こう星せい〉の周まわりを〈物もの〉が回まわるsomething orbits around a fixed star
地ち球きゅうはこの恒こう星せいの周まわりを回まわっている。
The Earth orbits around this star.

Kanji

恒constancy, always
星star, spot, dot

Related words

星ほしN4
星 is the common, everyday word for 'star', while 恒星 is the precise astronomical term specifically for a self-luminous star.

Opposites

惑わく星せいN1
惑星 (planet) orbits a star and reflects light, whereas 恒星 (fixed star) generates its own light and gravitationally anchors a system.

Don't confuse with

衛えい星せいN2
衛星 (satellite/moon) orbits a planet, unlike 恒星 which is a self-luminous star at the center of a system; learners sometimes confuse the two due to the shared 星 character.
惑わく星せいN1
恒星 is a star that generates its own light, while 惑星 is a planet that orbits such a star and shines only by reflection.

Word family· 12

恒こう星せい図ず
star map; star chart
恒こう星せい天てん
sphere of fixed stars
恒こう星せい年ねん
sidereal year
恒こう星せい日じつ
sidereal day

Etymology

From Chinese 恆星 (héngxīng), literally 'constant star', referring to stars that appear fixed in position relative to each other, as opposed to 'wandering stars' (planets).

恒こう星せい時じ

sidereal time

Show 5 more

恒こう星せい月げつ
sidereal month
恒こう星せい系けい
star system
恒こう星せい船せん
starship; interstellar spacecraft
恒こう星せい表ひょう
star catalog; star catalogue
恒こう星せい間かん
interstellar

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