Spanish original · English

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

El plano del círculo máximo que es perpendicular por el centro del eje cenit - nadir con respecto a un observador y se forma en el centro de la esfera celeste, es:The plane of the great circle perpendicular to the zenith-nadir axis at the centre of the celestial sphere is:

Show the answer

Correct answer: b) The true or rational horizon.

Why it is correct

It passes through the centre of the sphere: the true or rational horizon.

Why the others are not

  • a) That is the one seen at sea.
  • c) It passes through the observer’s eye.
  • d) No such term exists.

How to work it out in the exam

  1. Through the centre: true.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.