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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. 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 ...

  7. Copernican Revolution - Wikipedia

    en.wikipedia.org/wiki/Copernican_Revolution

    Nicolaus Copernicus's heliocentric model. Copernicus studied at Bologna University during 1496–1501, where he became the assistant of Domenico Maria Novara da Ferrara.He is known to have studied the Epitome in Almagestum Ptolemei by Peuerbach and Regiomontanus (printed in Venice in 1496) and to have performed observations of lunar motions on 9 March 1497.

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

    www.aol.com/entertainment/mercury-officially...

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  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 ...