Abd al-Rahman al-Sufi finished his Book of the Fixed Stars around 964, and it is one of the most important astronomical works ever written for a reason that is easy to miss. It is not a translation of Ptolemy, it is a critical revision: al-Sufi checked the magnitudes and positions against his own observation, corrected them, and illustrated every constellation twice, once as seen in the sky and once as seen on a celestial globe, that is, mirrored.
It also does something no Greek source does. For each Ptolemaic constellation al-Sufi records the indigenous Arabian names of the stars within it and the native figures they belonged to, setting the two systems side by side without collapsing one into the other. That is why the older sky is recoverable at all.
He is also the earliest known observer to record the Andromeda galaxy, which he describes as a little cloud, and to note the Large Magellanic Cloud from reports of southern observation.
The book was copied and illustrated for centuries, and the star names it carried entered European use through Latin and Castilian translations. When a modern astronomer says Aldebaran, Algol, Rigel or Betelgeuse, the chain of transmission runs through this book, and roughly two thirds of the proper names of bright stars in current use are Arabic.