周しゅう回かい軌き道どう

しゅ

う

か

い

き

ど

う

Meanings

1

noun

orbit

astronomy

Technical term in astronomy for the path of a celestial body or spacecraft around another body.

人じん工こう衛えい星せいは地ち球

きゅう

の

周しゅう

回かい

軌き

道どう

に

乗の

っ

て

いる

。

The artificial satellite is in orbit around the Earth.

Kanji

周circumference, circuit, lap
回-times, round, game
軌rut, wheel, track
道road-way, street, district

Related words

軌き道どう
軌道 is a broader term for any track or path, including railways and trajectories, while 周回軌道 specifically refers to a closed orbital path in astronomy.

Word family

月つき周しゅう回かい軌き道どう
lunar orbit
地ち球きゅう周しゅう回かい軌き道どう
earth orbit; geocentric orbit
太たい陽よう周しゅう回かい軌き道どう
heliocentric orbit; circumsolar orbit

Built from

周しゅう回かい+軌き道どう

Etymology

Compound of 周回 (shūkai, 'circulation' or 'going around') and 軌道 (kidō, 'orbit' or 'track'). The exact historical derivation is uncertain; the spelling is conventionally associated with the astronomical meaning.