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  2. Retrograde and prograde motion - Wikipedia

    en.wikipedia.org/wiki/Retrograde_and_prograde_motion

    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 .

  3. Apparent retrograde motion - Wikipedia

    en.wikipedia.org/wiki/Apparent_retrograde_motion

    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 ...

  4. Glossary of astronomy - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_astronomy

    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 ...

  5. Mercury Retrograde, Explained—and How to Survive When ... - AOL

    www.aol.com/mercury-retrograde-explained-survive...

    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?

  6. Mercury goes retrograde April 1. What it means for you - AOL

    www.aol.com/news/mercury-goes-retrograde-april-1...

    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 ...

  7. 6 Planets Are In Retrograde Now, Including Mercury: Meaning - AOL

    www.aol.com/6-planets-retrograde-now-including...

    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 ...

  8. Axial precession - Wikipedia

    en.wikipedia.org/wiki/Axial_precession

    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 ...

  9. What is Mercury Retrograde's Meaning? What You Need to Know - AOL

    www.aol.com/news/does-mercury-retrograde...

    What is the meaning of mercury retrograde? Mercury rules communication, so you can expect some communication breakdown whenever it stations retrograde. ... Mercury rules communication, so you can ...