The bright red star in the shoulder of Orion is known to modern observers as Betelgeuse, a name that traveled through French, Latin, and medieval Arabic manuscripts before arriving in English. Its origins are so layered and disputed that even scholars cannot agree on what the original term meant. This episode explores how an entire civilization's knowledge of the sky was preserved in ink, transmitted across cultures, and carried forward through centuries of careful copying.

The journey begins in the ninth-century translation halls of Baghdad, where Greek manuscripts like Ptolemy’s Almagest were rendered into Arabic. It follows the work of Islamic astronomers like Abd al-Rahman al-Ṣūfī, who independently verified stellar positions and created illustrated catalogs, and ends in the fifteenth-century observatory of Ulugh Beg in Samarkand, where ...