This animation made by Robert von Heeren with Redshift 7 SP1-Premium shows the relative motion of the biggest planet of the solar system Jupiter as seen from Earth (geocentric point of view) between 1/1/2010 and July 2011.
Time step is 12 hours. The yellow line is the orbital plane of Jupiter. The thick horizontal red line marks the plane of the ecliptic (the path of the Sun at the sky as seen from Earth), which is divided here into 15°-segments. 0° is marked with a V for vernal equinox, which is the beginning of the ecliptic and of the astrological zodiac sign Aries (0°-30°-segment of the ecliptic). The movement of Jupiter is emphasized with a white trail to see when he turns his motion into retrogradation on July 23rd 2010 and back to direct motion in November 2010.
In the meantime we see the Sun (Sonne) relatively moving from right to left.
@8bmc6 You find an introductory article explaining retrograde motion on englisch wikipedia if you search for apparent retrograde motion
robertoilmusici 1 year ago
Someone tell me how it starts going backwards
8bmc6 1 year ago