Plural of appulse; multiple instances of celestial bodies appearing to come close together as viewed from Earth.
Regular plural form of 'appulse,' maintaining the Latin root structure. The plural became standard in astronomical literature by the 18th century.
Astronomers had to track appulses carefully because they provided some of the most reliable ways to confirm orbital calculations and predict planetary movements before telescopes and modern instruments existed.
Complete word intelligence in one call. Free tier — 50 lookups/day.