天てん体たい分ぶん光こう学がく

noun

astronomical spectroscopy; astronomical photometry

Technical term covering both spectroscopy and photometry in astronomy. In practice, 天体分光法 is sometimes used for spectroscopy specifically, but this term encompasses both.

• 天てん体たい分ぶん光こう学がくは、星ほしの化か学がく組そ成せいを調しらべるのに使つかわれる。

  Astronomical spectroscopy is used to investigate the chemical composition of stars.

• 彼かれは天てん体たい分ぶん光こう学がくの研けん究きゅうで博はく士し号ごうを取とった。

  He earned his doctorate with research in astronomical spectroscopy/photometry.