HA

Từ điển WordNet v3.1 - WordNet Dictionary

noun

(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing;
the right ascension for an observer at a particular location and time of day
• Syn:
hour angle
• Topics:
astronomy, uranology
• Hypernyms:
angular distance

• Từ đồng nghĩa / Synonyms:
  hour angle, HA