Hover or tap underlined Spanish terms to see their translation and exam tip.
Arco de Ecuador desde Aries hasta el círculo horario del astro contado de 0º a 360º hacia el oeste.The arc of the celestial equator measured westward from the First Point of Aries from 0º to 360º to the hour circle of a body is:
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Correct answer: d) Answers b) and c) are both correct.
Why it is correct
The arc of the celestial equator measured westward from the First Point of Aries (♈) from 0° to 360° to the body’s hour circle is the Sidereal Hour Angle (SHA / AS), which is tabulated for the principal stars in the Nautical Almanac.
Why the others are not
- a) Azimuth is measured along the true horizon, not the equator.
- b) True, but option c) is also true.
- c) True, but option b) is also true.
How to work it out in the exam
- Sidereal Hour Angle (SHA): equatorial arc westward from Aries to body (0°–360°), tabulated in the Almanac.
Where this question comes from
- Región de Murcia · 2024 · 3ª convocatoria · CY Tipo 1 · question 7 Official paper · Official answer key
Pending instructor review. Machine translation, not reviewed.