Otherwise I'm impressed with the breath and quality of answers that related specifically to Muhammad and I feel like I have learnt a lot. The life of Muhammad is a difficult topic in these days when Islam has often been in the news for all the wrong reasons.
OK - you're right - we should get back on topic - the topic of interpreting the hype that Abdu'l Baha presents in the document you linked to:
http://reference.bahai.org/en/t/ab/SAQ/saq-7.html#fr4
I'll pick out just a couple of points for now if I may:
Abdu'l Baha claims:
These Arab tribes were in the lowest depths of savagery and barbarism, and in comparison with them the savages of Africa and wild Indians of America were as advanced as a Plato. The savages of America do not bury their children alive as these Arabs did their daughters, glorying in it as being an honorable thing to do.
In reality, as the footnote in the publication you cited indicates that the barbarous savagery of culturally condoned infanticide was (and is) only known to have been practiced by one Arabic tribe. In contrast, the practice of infanticide was certainly known in America all the way from Mexico to the Arctic Circle where the Inuit still practiced female infanticide right up to the 20th century. Strike one Abdu'l.
OK - try again Abdu'l:
...during the first centuries and down to the fifteenth century of the Christian era—all the mathematicians of the world agreed that the earth was the center of the universe, and that the sun moved. The famous astronomer who was the protagonist of the new theory discovered the movement of the earth and the immobility of the sun. 5 Until his time all the astronomers and philosophers of the world followed the Ptolemaic system, and whoever said anything against it was considered ignorant...
...But there are some verses revealed in the Qur’án contrary to the theory of the Ptolemaic system. One of them is “The sun moves in a fixed place,” which shows the fixity of the sun...
This latter claim, according to the footnote, being a reference to Surah Ya-Sin verse 38 - I could not find a single English translation that suggests this verse was meant to contradict the Ptolemaic system - I am certainly no expert in Arabic but it really looks to me like this verse is simply describing the obvious apparent motion of the Sun across the sky as observed from earth. There doesn't seem to be any way to make this passage contradict Ptolemy or vindicate Gallileo (or, for that matter, Copernicus who Abdu'l Baha fails to credit - but that's a minor point).
Anyway, the point is that crediting Muhammad with supporting heliocentrism is a heck of a stretch. On balance, I reckon that's strike two!
I'll allow an appeal to the umpire at this point - unless someone else wants to read through the passage (its not too long) and deliver the
coup de gras.