equant

Speech parts

1. equant - Noun

2. equant - Adjective

Meaning

A circle around whose circumference a planet or the center of ann epicycle was conceived to move uniformly; -- called also eccentric equator.

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Examples

Ismael Boulliau accepted elliptical orbits but replaced Kepler's area law with uniform motion in respect to the empty focus of the ellipse, while Seth Ward used an elliptical orbit with motions defined by an equant. Source: Internet

Laplace's theory of celestial mechanics reduces to Kepler's when interplanetary interactions are ignored, and Kepler's reproduces Ptolemy's equant in a coordinate system where the Earth is stationary. Source: Internet

Typical orthosilicates tend to form blocky equant crystals, and are fairly hard. Source: Internet

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