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periapsis
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noun (pl=periapsides)
  1. (astronomy) The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum. In the case of other celestial bodies, specialised terms are used. See w:en:Apsis, Apsis (Wikipedia) for details.
Translations:
  • French: périapse, périapside
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