:salam2: Brother Abu Haytem,
The science of astronomy observed that the speed of planet Mars decreased in its course towards the eastern direction to the level we notice the “waver” between the east and the west, and on Wednesday the 30th July 2003, the planet movement apparently stopped going towards the eastern direction. Then in the months of August 2003 and September 2003, .Mars apparently changed its course in the opposite direction to the West- and that until the end of September. This movement is called “Retrograde Motion”.
Thus, some have speculated that this could happen by retrograde motion of planets. Retrograde motion is the apparent motion backwards in the sky as viewed from the Earth. Normal motion of planets in the sky is from west to east, but sometimes, outer planets seem to slow to a stop, reverse direction for a time, and then resume their original direction.
The applet (animation) below demonstrates how retrograde motion work. Watch Mars' apparent motion across the Earth's sky as the Earth passes Mars in their orbits around the Sun.
http://www.mhhe.com/physsci/astronomy/applets/Retro/frame.html
In above link provided (animation) you can see:
Sun at center is in yellow colour, Venus green colour, Earth Blue colour, Mars Red Colour. The relative motion between earth and mars is shown by drawing a line between earth and mars representing the "line of sight" of a observor from earth. Actually, if we see this phenomenon from mars earth already retrograde same time when mars retrograde but we as human need to see this from earth not from mars. Also, we need to see the sun retrograde and not the earth as part of fulfillment of the "sign".
So, you can also note that retrograde is just a "observation thing" between two moving planets i.e. earth and mars.
I was wondering if same could be observed between earth and sun. But i think not possible.
However it is our belief that it will occur and might occur sooner or later but we are unaware! Prophet Muhammad (Pbuh) said: “One of the signs of the hour, the sun will rise from the west, where no longer Tauba (forgiveness) will be granted”! And the strange thing, most of our Shariah scholars mentioned that the rise of the sun from the west occurs only once, on that day, the sun will rise from the west, then again from the east, and continues until Allah wishes, and this is similar to what is happening to Mars, it stops, then it changes its course of direction for a short period of time, then returns to the way once it was.
Abu Hurayrah(RA) narrated that the messenger of Allah (Pbuh) said, “The day of the hour will not come until the sun rises from the west, if it rises and Allah places His hand at night to forgive his morning sinners, and places in the morning to forgive his night sinners until the sun rises from the west” (Muslim).
P.S: Allah can use any method any time to fulfill his signs. And Allah Knows The Best.
Wasalam