🝶

• A filled opposition symbol, ⟨☍⟩

🝶

1. (astronomy, astrology) symbol for a lunar eclipse, or, more generally (but rarely), for any celestial body found in the shadow of another, such as the timing of Io entering Jupiter's shadow, used by Rømer to calculate the speed of light.

   'moon in opposition to the Sun' (full moon)

   'moon shadowed from the Sun' (i.e. lunar eclipse, commonly abbreviated )

   Ⅰ 'Io in Jupiter's shadow'

• (US Patent Office style manual)

• (Solar eclipse)