When I first read Anan's post, I thought he had the date wrong, and he was referring to the observation of Gervase of Canterbury on June 18, 1178.
Some people have suggested that this might have been the event that created the crater "Giordano Bruno". If so, perhaps there is some other lunar crater that might be associated with the Prophet's event (thought that seems unlikely).
On the evening of June 18, 1178] after sunset when the moon had first become visible a marvelous phenomenon was witnessed by some five or more men...Now there was a bright new moon...its horns were tilted toward the east; and suddenly the upper horn split in two. From the midpoint of the division a flaming torch sprang up, spewing out, over a considerable distance, fire, hot coals, and sparks. Meanwhile the body of the moon which was below writhed, as it were, in anxiety...the moon throbbed like a wounded snake. Afterwards it resumed its proper state. This phenomenon was repeated a dozen times or more, the flame assuming various twisting shapes at random...Then after these transformations the moon from horn to horn...took on a blackish appearance. The present writer was given this report by men who saw it with their own eyes, and are prepared to stake their honour on an oath that they have made no addition or falsification in the above narrative
But then I remembered that someone else had recently posted to the UT forum saying that he thought that the moon that the Holy Quran was referring to was actually Iapetus.
In any case, I have to go along with JohnW on this one. We have no lingering physical evidence outside the eye witness accounts in this book that the moon was split, and that if we invoke divine intervention, we do not expect to find evidence either.
Forming opinions as we speak