Basing the Quraan Majeed on scientific theories

Q: 1:  Geocentrism [Quran 36:38-40] - And the sun runs [on course| toward its stopping point. That is the determination of the Exalted in Might, the Knowing. And the moon - We have determined for it phases, until it returns [appearing] like the old date stalk. It is not allowable [i.e., possible] for the sun to reach the moon, nor does the night overtake the day, but each, in an orbit, is swimming

The Quran describes the universe as the geocentric model, where the earth is the center of the universe and everything is orbiting us. In reality, this is not true and everyone at this time back then believed in this model. The sun actually doesn't orbit us, we orbit it instead. It just looks like the sun is moving but actually the earth is just spinning. Muslims "refute" this by pointing out that the sun orbits the milky way, which is true but if the Quran was actually talking about the sun orbiting the milky way, how would that even be relevant to us at that time rather than the common belief of geocentrism? That 230 million year orbit around the milky way has absolutely nothing to do with humanity whatsoever. Besides, the entire solar system and everything within the gravitational region of the black hole in the center of the milky way orbits it, not just us.

Why would the Quran only refer to the sun if it was talking about the gravitational regions of the black hole? Why would the Quran not speak about the very common 7th century belief rather than something absolutely no one knew about?  

It is not allowable [i.e., possible| for the sun to reach the moon, nor does the night overtake the day, but each, in an orbit, is swimming.

In this verse, the issue is that the movements of the sun and moon are described similarly, whereas our model of the universe has the sun and moon's movements as completely different. Why does the Quran discuss the orbit of the sun in the same verse that explains the phenomenon of day and night, if it is not referring to geocentrism?

[Sahih al-Bukhari 3199] - The Prophet (sallallahu alaihi wasallam) asked me at sunset, "Do you know where the sun goes (at the time of sunset?" I replied, "Allah and His Apostle know better." He said, "It goes (i.e. travels) till it prostrates Itself underneath the Throne and takes the permission to rise again, and it is permitted and then (a time will come when) it will be about to prostrate itself but its prostration will not be accepted, and it will ask permission to go on its course but it will not be permitted, but it will be ordered to return whence it has come and so it will rise.

Muslims often respond to this hadith desperately trying to reinterpret it. The usual Muslim response is "well what does 'prostrating' mean or what does 'goes'mean?" ..Well if these aren't signifying orbit, then what does "underneath the throne mean"? I think we can all agree that this hadith says the sun at some point is underneath the throne of Allah. And as we know, the throne of Allah is above the waters which are above the seventh heaven of the flat earth. The only way for the sun to be underneath the throne of Allah is for it to be above the earth, which would fit the geocentric world view. Scientifically speaking, the sun is not above the earth and it never will be. This hadith is geocentric, there's no escaping it. [Sahih al-Bukhari 3124]

Please answer everything here.

Salaah for an old person who forgets basic things

Q: I am inquiring regarding the prayer of an old woman in her 80s, who forgets daily essentials. For example, she forgets when it is time to eat food or did she already eat or not etc. She forgets her family members, for example if any name of her daughter or grand child is mentioned to her then she would hesitate to say who that person is; family member or stranger. But if she is reminded then she would know the person but again in a minute she would forget completely.

If she hears the Azan being called out then she quickly starts getting ready for salah and performs according to the best of her ability. Then, if she hears another masjid calling azan ~15 minutes later for the same prayer, she prays this salah again because she thinks she hasn’t prayed this salah yet.

Is this woman obliged by shariah to perform her five daily prayers? 

Passing the meeqat without entering into ihraam

Q: I am from Pakistan and I am here to perform umrah. My first 3 umrahs are done successfully but when I was coming from Madina after living 10 days on the meeqat. I didn’t wear ihram because I make my mind that I will perform umrah after one day. After one day I will go to Ayesha Mosque and wear ihram from that place. Do I have to give dam since I didn’t wear ihram from the madinah meeqat?