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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 .
The term retrograde is from the Latin word retrogradus – "backward-step", the affix retro-meaning "backwards" and gradus "step". Retrograde is most commonly an adjective used to describe the path of a planet as it travels through the night sky, with respect to the zodiac, stars, and other bodies of the celestial canopy. In this context, the ...
This glossary of astronomy is a list of definitions of terms and concepts relevant to astronomy and cosmology, their sub-disciplines, and related fields. Astronomy is concerned with the study of celestial objects and phenomena that originate outside the atmosphere of Earth. The field of astronomy features an extensive vocabulary and a ...
Mercury retrograde is here August 23rd through September 15th, 2023. Let me, a professional astrologer, break it down for you. So, What Does Mercury Retrograde Actually Mean?
Five planets are going to be retrograde in the summer of 2024. Here are the dates for Mercury retrograde, Venus retrograde, Saturn retrograde, Neptune retrograde, Pluto retrograde and more.
The first Mercury retrograde of 2024 spans from April 1 to 25. The effects of the retrograde period have already started. Mercury entered its pre-retrograde shadow on March 18. Mercury will be in ...
In the Hipparchian, Ptolemaic, and Copernican systems of astronomy, the epicycle (from Ancient Greek ἐπίκυκλος (epíkuklos) ' upon the circle ', meaning "circle moving on another circle") [1] was a geometric model used to explain the variations in speed and direction of the apparent motion of the Moon, Sun, and planets.
The planets Pluto, Neptune, Uranus, Saturn, Jupiter, and Mercury are in retrograde right now. here's what retrograde means and how it will affect your zodiac sign. 6 Planets Are In Retrograde Now ...