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Wiktionary:Word of the day/2021/May 15

From Wiktionary, the free dictionary

Word of the day
for May 15
apastron n
  1. (astronomy) The point of greatest separation between a celestial object and the star which it orbits.

Today, the Saturday nearest the first quarter moon between mid-April and mid-May in 2021, is the first of two Astronomy Days in the year.

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