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

Los puntos cardinales Este y Oeste, en la esfera celeste, están definidos por:The East and West cardinal points on the celestial sphere are defined by:

Show the answer

Correct answer: c) The intersection of the celestial equator, the prime vertical and the astronomical horizon.

Why it is correct

The celestial equator and the prime vertical cut the horizon at the same two points: E and W.

Why the others are not

  • a) That defines the poles.
  • b) That is the observer’s vertical.
  • d) An almucantar is parallel to the horizon and does not cut it.

How to work it out in the exam

  1. E and W: celestial equator meets the horizon.

Where this question comes from

Try it: Sight reduction

Pending instructor review. Machine translation, not reviewed.