Hover or tap underlined Spanish terms to see their translation and exam tip.
Cuando la altura de un astro es 90º, ¿qué magnitud vale 0º?:When a body’s altitude is 90º, which quantities are 0º?
Show the answer
Correct answer: c) The zenith distance and the local hour angle
Why it is correct
At 90º the body is at the zenith, on the meridian. So zenith distance and LHA are zero; azimuth is undefined.
Why the others are not
- a) Zenith distance too.
- b) It is undefined.
- d) Option c is correct.
How to work it out in the exam
- At zenith: z = 0, LHA 0.
Where this question comes from
- Junta de Andalucía · 2026 · 1ª convocatoria · CY Módulo de navegación · question 4 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.