De quoi est fait sextant
An instrument for measuring the altitude of celestial bodies.
- Lens — a pour partie. The sextant’s telescope.
- Mirror — a pour partie. Mirrors — the principle of double reflection.
- Reflection of light — utilise. Double reflection brings the celestial body and the horizon together.
- Trigonometry — utilise. Navigational calculations.
- Laiton — est fait de. A sextant is brass.