Astronautics Vocabulary
The Astronautics Vocabulary is a glossary of terms that pertain to the science and technology of spaceflight. This alphabetical list can be navigated by clicking on the letters A-Z displayed on this page.
Definition of meridian
Translation: méridien
Definition: The great circle on the celestial sphere passing through the poles and the zenith.
Other Definition: A line of longitude on the Earth or another astronomical body.
Synonym: None
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