As your source admits (but downplays) several philosophers had described a heliocentric system centuries before the Quran was written, so any mention of heliocentricity in the Quran could not be claimed to be miraculous. However, the Quran describes a geocentric system. It claims that night and day are caused by the sun and moon moving in their orbits (21:33), when it is actually because of the rotation of the earth. The moon has nothing to do with night and day
No there aren't.
This is just dishonest apologetics. The Quran does not say that. It says "And the sun runs unto a fixed resting-place". The word for "runs" (tajrī) is used many times in the Quran to describe the flowing of rivers and sailing of boats, etc. It is describing a sun moving along a path. This is confirmed in 13:1221:33 and 31:29.
There is no suggestion of axial rotation.
But they don't. Such an observation implies a geocentric system. They only appear to move because of the rotation of the earth. They are fixed points relative to earth's position (which is why astronavigation works) And there is only one universe (heaven) containing the stars we see.
Even disingenuous apologetics deliberately designed to mask the errors in the Quran are wrong!
Scientists May Have Discovered How the Ancient Greeks' 'First Computer' Tracked the Cosmos | Smart News | Smithsonian Magazine
In 1901, found on an ancient sunken Roman ship, the Antikythera mechanism is thought to be a mechanical computer to compute orbits of planets, and thought to have been invented by Hipparchos (lived 190 BC to 120 BC). The website above says that it combined Babylonian astronomy, Plato's math, and Greek astronomical theories in 30 bronze gears, and 82 fragments. Apparently it placed the earth at the center of the universe. In 2006, Freeth (University College, London) noticed a "user guide" inscription. It predicted phases of the moon