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Apparent Retrograde Motion
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Geliefert zwischen Mi., 26.11.2025 und Do., 27.11.2025
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High Quality Content by WIKIPEDIA articles! Apparent retrograde motion is the motion of a planetary body in a direction opposite to that of other bodies within its system as observed from a particular vantage point. Direct motion or prograde motion is motion in the same direction as other bodies. While the terms direct and prograde are equivalent in this context, the former is the traditional term in astronomy. Prograde was first seen in an abstract of an astronomy-related professional article in 1963. The term retrograde is from the Latin word retrogradus "backward-step". The affix retro- meaning backwards and gradi step or to go. 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 term refers to planets as they appear from Earth, to briefly stop and reverse direction at certain times, though in reality they perpetually orbit in the same uniform direction.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130855116
- Genre Geowissenschaften
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Anzahl Seiten 96
- Herausgeber Alphascript Publishing
- EAN 9786130855116
- Format Fachbuch
- Titel Apparent Retrograde Motion
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