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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. Remember though: Each retrograde has a shadow period before and after, which also lasts about two to three weeks, meaning that each Mercury retrograde holds influence for close to two months at a ...

  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. Distant retrograde orbit - Wikipedia

    en.wikipedia.org/wiki/Distant_retrograde_orbit

    A distant retrograde orbit (DRO), as most commonly conceived, is a spacecraft orbit around a moon that is highly stable because of its interactions with two Lagrange points (L 1 and L 2) of the planet–moon system.

  8. A Complete Guide to Every Mercury Retrograde Happening ... - AOL

    www.aol.com/complete-guide-every-mercury...

    Leo rules the heart in astrology, meaning this retrograde could deal with your love life. This retrograde is also special because it begins in Virgo, the sign of its rulership, before moving into Leo.

  9. Vakri grahas - Wikipedia

    en.wikipedia.org/wiki/Vakri_grahas

    Vakragati means retrograde motion. As the Earth passes by a planet that particular planet appears to move backwards i.e. westward, amid the stars, this phenomenon is called retrograde motion, which motion invariably occurs at a time when that planet is visible for a relatively longer period. the approximate midpoint of which period in respect of the superior planets coincides with opposition ...