Apaigí

Is éard atá in apaigí ná an pointe ar a fhithis éilipseach ag a bhfuil an Ghealach, nó aon satailít, ag a chianphointe ón Domhan.[1]

Tagairtí

  1. Hussey, Matt (2011). "Apaigí". Fréamh an Eolais. Coiscéim. p. 45.
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