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Each night the planet appeared to lag a little behind the stars, in what is called prograde motion. Near opposition, the planet would appear to reverse and move through the night sky faster than the stars for a time in retrograde motion before reversing again and resuming prograde. Epicyclic theory, in part, sought to explain this behavior.
The Ananke group is a group of retrograde irregular satellites of Jupiter that follow similar orbits to Ananke and are thought to have a common origin. Their semi-major axes (distances from Jupiter) range between 19.2 and 21.8 Gm , their orbital inclinations between 144.3° and 155.5°, and their orbital eccentricities between 0.09 and 0.30.
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 symbol for retrograde motion is ℞, a capital 'R' with a tail stroke. [23] [24] [25] An 'R' with a tail stroke was used to abbreviate many words beginning with the letter 'R'; in medical prescriptions, it abbreviated the word recipe [26] (from the Latin imperative of recipere "to take" [27]), and in missals, an R with a tail stroke marked ...
Jupiter, the planet of prosperity and abundance, stations retrograde in Taurus from September 4 to December 30, 2023. After a summer filled with retrograde madness, one more planet is set to take ...
Diagram of positional astronomy. In positional astronomy, two astronomical objects are said to be in opposition when they are on opposite sides of the celestial sphere, as observed from a given body (usually Earth). A planet (or asteroid or comet) is said to be "in opposition" or "at opposition" when it is in opposition to the Sun.
The retrograde motion of a hypothetical extremely distant (and nearly non-moving) planet would take place during a half-year, with the planet's apparent yearly motion being reduced to a parallax ellipse. The center of the retrograde motion occurs at the planet's opposition which is when the planet is exactly opposite the Sun.
Jupiter retrograde begins, shaking up Libra's philosophy about life. It'll be important to tap into optimistic thinking intentionally. Otherwise, your mind may focus on the worst-case scenario.