Spanish original · English

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

El zénit representa:On the celestial sphere, the zenith represents:

Show the answer

Correct answer: a) The projection of the observer onto the celestial sphere.

Why it is correct

Extending the observer’s vertical upward from the centre of the Earth to intersect the celestial sphere defines the zenith (Z), which is the projection of the observer’s position onto the celestial sphere (opposite the nadir).

Why the others are not

  • b) The celestial body is already plotted on the celestial sphere.
  • c) The projection of the body onto the Earth is its geographical position (GP).
  • d) A body’s highest point in diurnal motion is its upper meridian transit (culmination).

How to work it out in the exam

  1. Zenith (Z): vertical projection of the observer onto the celestial sphere.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.