Spanish original · English

Hover or tap underlined Spanish terms to see their translation and exam tip.

Cuando observamos un astro, los vértices que se forman en el triángulo de posición de la esfera celeste correspondiente, forman unos ángulos que son:When we observe a body, the vertices of the corresponding position triangle on the celestial sphere form angles which are:

Show the answer

Correct answer: a) Zenith angle, meridian angle and parallactic angle.

Why it is correct

The vertices are zenith, pole and body, giving those three angles.

Why the others are not

  • b) The nadir is not a vertex.
  • c) Declination relates to a side, and apogee plays no part.
  • d) Codeclination is a side, and perigee plays no part.

How to work it out in the exam

  1. Zenith, pole, body: zenith, meridian, parallactic.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.