Phenomenon
Quadrature
A planet 90° from the Sun in our sky.
The configuration when a planet appears at a right angle to the Sun as seen from Earth, dividing the cycle between conjunction and opposition.
Overview
The configuration when a planet appears at a right angle to the Sun as seen from Earth, dividing the cycle between conjunction and opposition.
See also
Opposition
When a planet sits opposite the Sun in our sky.
Elongation
An inner planet's angular distance from the Sun.
Retrograde Motion
A planet apparently moving backwards among the stars.
Axial Precession
The slow wobble of a planet's rotation axis.
Planetary Ring
A disc of dust and ice circling a planet.
Ring Gap
A clear lane within a planetary ring.