Astronomy Answers
From the Astronomical Dictionary


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The description of the word you requested from the astronomical dictionary is given below.

the transit

transit, plural transits

A transit is

  1. the moment when a celestial body crosses the meridian (sense 2).
  2. a passage of an apparently smaller body in front of an apparently larger body. More particularly: the crossing of Mercury or Venus in front of the Sun, as seen from Earth.