Spanish original · English

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

En la esfera celeste, el eje que va desde el punto de situación del observador, pasa por el centro de la esfera y sale por la parte opuesta, se le conoce como:On the celestial sphere, the axis from the observer’s position through the sphere’s centre and out the opposite side is known as:

Show the answer

Correct answer: b) Zenith-nadir axis.

Why it is correct

The observer’s vertical axis runs from the zenith overhead to the nadir underfoot. It is the reference for the horizon.

Why the others are not

  • a) Not the term.
  • c) Not the term.
  • d) Not the term.

How to work it out in the exam

  1. Vertical: zenith-nadir.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.