Abraham Ben Chaja [Chija] (1070 - 1105)
Ben Chaja was born around 1070 in Barcelona, Spain. He was a pupil
of Rabbi Moses Haddarschan . Ben Chaja is said to have been a great astronomer
and wrote some works on Astronomy and Geography. One tells about the form
of the earth, the elements and the structure of the spheres. (Manuscripts
may be in the Vatican, in Vienna and Paris). This work was printed in Basel
by Oswald Schreckenfuchs, including a latin translation.
Other works included papers on astrology, trigonometry and music.Ben Chaja was called 'the great Astronomer', he died after 1105. Ben Chaja was the teacher of Ben Esra.
Reference(s):
Allgemeine Enzyklopädie der Wissenschaften
und der Künste, Part 1, Vol. 1, p. 157
Illustr. Lexikon der Astronomie,
by Adolph Drechsler, Verlag J.J. Weber, Leipzig 1881, p. 5
Pogg. Vol. I, p.5
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