coelostat

• Instrumento óptico com um espelho móvel e outro fixo, usado para acompanhar o movimento de um astro e refletir sua luz para um telescópio.

An optical device with a movable and a fixed mirror, used to track the path of a celestial body and reflect its light into a telescope.

1. Optical device for celestial trackingC2formalscientific

   An optical instrument that uses a movable mirror and a fixed mirror to reflect the light from a celestial body into a stationary telescope, compensating for the Earth's rotation.

   Celostato

   • The astronomer adjusted the coelostat to track the sun's path across the sky.
   • A coelostat is essential for long-exposure solar photography.
   • The observatory's coelostat allowed them to study the star's spectrum continuously.