Apparently some Muslims believe the sun will rise from the west for 3 days. How common is that belief in Islam?

Muslims don't "believe" they are told.

Very common, to them is one of the signs of the apocalypse.

as far as science to Muslims goes: for every scientific finding they try to find a verse in the Koran to justify that god knew about it before scientists.

mathematics/astronomy in medieval Islam was influenced by Koranic verses:

http://en.wikipedia.org/wiki/Mathematics...

Every Muslim should believe that the sun will rise from west.

This is one of the major signs of the Hour.

It is one of the greatest signs of the apocalypse in Islam.

our old earth get tired, then it will perform apposed spinning

Never heard of it
Is it a" private interpretation" from a Shia source?

Fundamentalist Islam ( and usually 'fundamentalist' anything) is not fully open to the physical sciences if it is not a literal reinforcement of its scriptural interpretation and particular oral tradition ( and this goes for social sciences as well and humanities)
There are many different and combating sects and strands of Fundamentalist Islam

Yes, it will happen. It will be the biggest sign of the end of time.

It is a major belief for Muslims of one of the signs of Judgement day. It isn't a feat to be achieved but an event to occur. Judgement day is a once-in-the-history-of-time event and many religions describe extremely unusual events that will precede it. If we are still around when it happens, I hope you'll keep your word and convert. lol




added:

Aaj, it has nothing to do with retrograde motion.

Apparently some non-Muslims think they are smart by posing such questions while being utterly ignorant of science and astronomy.

One phenomenon that ancient astronomers had difficulty explaining was the retrograde motion of the planets. Over the course of a single night, a planet will move from East to West across the sky, like any other celestial object near the ecliptic.

If observed from one night to the next, however, a planet appears to move from West to East against the background stars most of the time. Occasionally, however, the planet's motion will appear to reverse direction, and the planet will, for a short time, move from East to West against the background constellations. This reversal is known as retrograde motion.

Scientists believe that all planets go through this at least once in their life time while others do it more often. And it is said that earth is nearly close that time in its life cycle and will do it soon.

Current Retrograde Movements:

Mercury usually turns retrograde three times a year.
Venus retrogrades every eighteen months
Mars turns retrograde only once every two years


Retrograde Planetary Cycles

* Mercury
Retrograde 24 days
Stationary approx. 3 days

* Venus
Retrograde 42 days
Stationary approx. 11 days

* Mars
Retrograde 80 days
Stationary approx. 20 days

* Jupiter
Retrograde 120 days
Stationary approx. 10 days



* Saturn
Retrograde 140 days
Stationary approx. 10 days

* Uranus
Retrograde 150 days
Stationary approx. 16 days

* Neptune
Retrograde 160 days
Stationary approx. 16 days

* Pluto
Retrograde 160 days
Stationary approx. 16 days