Egyptian astrologer and astronomer Ali ibn Ridwan, writing in a commentary on Ptolemy's Tetrabiblos, stated that the "spectacle was a large circular body, 2½ to 3 times as large as Venus.
Astrologul și astronomul egiptean Ali ibn Ridwan, comentând Tetrabiblosul lui Ptolemeu, a afirmat că "...era un corp circular mare, de 2-1/2 până la 3 ori mai mare ca Venus.