What does HA mean in NASA?
This page is about the meanings of the acronym/abbreviation/shorthand HA in the Governmental field in general and in the NASA terminology in particular.
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What does HA mean?
- hour angle, HA(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