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Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is, the central object (right figure). It may also describe other motions such as precession or nutation of an object's rotational axis .
However, retrograde motion of a planet is merely an illusion, the planet only appears to retrograde, actually it does not [2] and in which event if the faster planet is retrograde it can approach the slower planet from a later degree by backward motion which phenomenon is known as - "the applying aspect" in the Western astrology and the "Tajika ...
The retrograde motion of a hypothetical extremely distant (and nearly non-moving) planet would take place during a half-year, with the planet's apparent yearly motion being reduced to a parallax ellipse. The center of the retrograde motion occurs at the planet's opposition which is when the planet is exactly opposite the Sun.
"Retrograde" is a term used to describe when a planet's orbit appears to slow. Technically, they are optical illusions, but we astrologers believe they have an effect down here on Earth.
The direction changed from prograde to retrograde midway between these years at −1301 when it reached its maximum deviation of 27°, and would have remained retrograde, the same direction as modern precession, for 3600 years until 2299. [16] [17]: 29–30 Another trepidation was described by Varāhamihira (c. 550). His trepidation consisted ...
Each synodic day, this gradual motion is a little less than 1° eastward (360° per 365.25 days), ... Due to the slow retrograde rotational speed of Venus, ...
Eastward motion of deferents; period set by observation of planet going around the ecliptic Planets Retrograde motion: Motion of epicycle in same direction as deferent. Period of epicycle is time between retrograde motions (synodic period). Planets Variations in speed through the zodiac Eccentric per planet Planets Variations in retrograde timing
Apparent retrograde motion is the periodic, apparently backwards motion of planetary bodies when viewed from the Earth (an accelerated reference frame). Satellite is an object that orbits another object (known as its primary). The term is often used to describe an artificial satellite (as opposed to natural satellites, or moons).