Latest / Timbuktu: Africa's Forgotten Center of Knowledge — Fexingo History / Timbuktu's Lost Astronomers: Stars Over the Sahel
Transcript
- Lucas: So we've talked a lot about Timbuktu's scholars — the jurists, the historians, the doctors. But there's one field they excelled at that we haven't touched: astronomy. And I'm not talking about astrology or fortune-telling — I mean serious, mathematical astronomy used to calculate time, direction, and the movements of celestial bodies. Luna: Wait — in the middle of the Sahara, with no telescopes, they were doing astronomy? Lucas: Exactly. And they were brilliant at it. The Sankore madrasa had a strong tradition of what we'd call 'ilm al-falak — the science of the heavens. Scholars studied the works of al-Battani and al-Farghani, and they produced their own star tables. The most famous was a man named Ahmad al-Wangari, who lived in the late 15th and early 16th centuries. Luna: Al-Wangari — I think that name came up in the episode about geographers. Lucas: Good memory — yes, he was also a geographer. But his astronomical work was remarkable. He wrote a treatise on the lunar mansions — the manazil al-qamar — which are the 28 segments of the sky the moon passes through each month. These were crucial for tracking time and seasons, especially for farmers and travelers. Al-Wangari didn't just copy earlier Arabic works; he adapted them to the Sahelian sky, noting which stars were visible from Timbuktu's latitude. Luna: So he was doing original observation, not just repeating what he'd read. Lucas: Exactly. And that's what makes it so impressive. The scholars of Timbuktu used instruments like the astrolabe — we mentioned that in episode 157 — but also simpler tools like the gnomon, basically a vertical stick whose shadow length told you the time of day and the season. They needed precise timekeeping for the five daily prayers, and for determining the direction of Mecca. But they also used astronomy for navigation across the Sahara, and for agricultural calendars. Luna: Navigation in the desert — that's basically like navigating at sea, right? No landmarks. Lucas: Very similar. Caravans relied on the stars to find their way between watering holes, especially at night when it's cooler. The Tuareg, in particular, had a deep knowledge of star patterns — they called certain stars by local names, like 'the she-camel' or 'the travelers.' And the scholars at Sankore synthesized this practical knowledge with the mathematical astronomy they learned from Arabic and Persian texts. There's a manuscript from the 17th century, written by a scholar named Muhammad al-Kunti, that describes how to use the position of the Pleiades to predict the arrival of the rains. Luna: That's exactly the kind of fusion I love — book learning and local knowledge coming together. Lucas: It's a perfect example. And the manuscripts show that they could calculate eclipses. The Tarikh al-Sudan records a solar eclipse in 1582 that was observed in Timbuktu. The scholars there would have been able to predict it using the Zij tables — astronomical handbooks that gave positions of the sun and moon. We know that al-Wangari owned a copy of the Zij al-Sindhind, one of the most famous Indian astronomical tables, translated into Arabic. Luna: So they had access to global scientific knowledge, all the way from India to West Africa, through the trade routes. Lucas: Absolutely. Timbuktu was a node in a network that stretched from Spain to China. And that's what makes the loss of so many manuscripts so tragic. When the Moroccan invasion came in 1591, many of the astronomical works were destroyed or scattered. We know from the surviving catalogs that there were dozens of treatises on astronomy in the libraries of Timbuktu, but only a fraction remain. The Fondo Kati and Mamma Haidara collections still hold some, but many were lost. Luna: It's heartbreaking to think what we've lost. But also amazing that anything survived at all. Lucas: That's the thing — the manuscripts that did survive, hidden in desert caves and family libraries, they're now being digitized and studied. And they're revealing a scientific tradition that was far more sophisticated than we used to think. For example, one manuscript shows that a scholar named al-Suyuti — not the famous Egyptian, but a local namesake — wrote a critique of astrological predictions, arguing that only mathematical astronomy was valid for determining prayer times. That's a really modern-sounding distinction. Luna: So they were drawing sharp lines between science and superstition, even then. Lucas: Exactly. And it's a reminder that the story of Timbuktu isn't just about gold and salt and manuscripts — it's about a community of scholars who looked up at the same sky we do and asked the same questions: where are we, when is it, how does it all work? And they left us their answers, written in beautiful Arabic script, on pages that almost didn't survive. Luna: You know, it makes you think about all the knowledge that gets lost when a civilization is disrupted. And how precious it is when we can recover even a little. Lucas: That's actually something I've been thinking about a lot. This show exists because we believe those stories matter — and we want to keep telling them without any ads or interruptions. And the way we're able to do that is thanks to listeners who support the show directly. If you've been enjoying these conversations about West Africa, and you'd like to help us keep going, you can buy us a coffee, as they say — at buy me a coffee dot com slash fexingo. Luna: It really does make a difference. Every bit of support means we can spend more time digging into the archives and bringing you stories that don't get told anywhere else. Lucas: Exactly. And speaking of stories that don't get told — there's another layer to this astronomical tradition that I find really fascinating. The Tuareg, who were often the ones actually moving through the desert, they had their own star lore that ran parallel to the scholarly tradition. And sometimes the two intersected in surprising ways. Luna: Like how? Lucas: Well, the Tuareg used the stars to navigate, but they also had a rich mythology around them. For instance, they called the constellation we know as Orion's Belt 'the three girls' — and they had stories about why they were always together. Some of these oral traditions were recorded by European travelers in the 19th century, but the Tuareg themselves have passed them down for centuries. And there's evidence that some of the Sankore scholars incorporated these local names into their star tables, creating a kind of bilingual astronomy. Luna: So the scholars weren't just in an ivory tower — they were listening to the people who actually lived in the desert. Lucas: Exactly. And that practicality is what kept astronomy alive in Timbuktu for so long. Even after the city declined, the knowledge persisted among the Tuareg and the Fulani herders, who still use the stars to time their migrations. In fact, there's a manuscript from the 18th century written by a Fulani scholar named Muhammad al-Fullani al-Kashinawi — he was from Kano, but he studied in Timbuktu — and he wrote a treatise on the use of the astrolabe that was later studied in Cairo and even in Europe. So the knowledge traveled back out. Luna: Wait — a scholar from Timbuktu taught Europeans about the astrolabe? Lucas: Indirectly, yes. Al-Kashinawi's work was copied and carried across North Africa. A copy ended up in the library of the University of Leiden in the Netherlands. So the astronomical tradition of Timbuktu didn't just stay in the Sahel — it contributed to the global conversation. And that's something we're only now beginning to fully appreciate, as more manuscripts are cataloged and translated. Luna: It's like a hidden thread connecting the Sahara to the rest of the world. Lucas: Exactly. And that thread is still there — it's just fragile. The manuscripts are aging, and some are still in private hands, at risk from climate and conflict. But there are projects now to preserve and digitize them. The Hill Museum & Manuscript Library, for example, has worked with the Mamma Haidara library to microfilm thousands of pages. So the knowledge that al-Wangari and others wrote down five hundred years ago is still being read, still being studied. And it still has things to teach us. Luna: Like what, for instance? Lucas: Well, one thing is how to do precise astronomy without high-tech instruments. Al-Wangari's methods for determining the altitude of the sun using a gnomon are surprisingly accurate — they could get within a degree or two. That's useful even today for teaching basic astronomy. And his star tables, if we reconstruct them, could help us understand how the night sky has changed over the centuries — because of precession, the positions of stars shift. So his observations from the 1500s are a data point for modern astrophysics. Luna: That's incredible — five-hundred-year-old data still being useful today. Lucas: It really is. And it shows that when we talk about 'lost knowledge,' we're not just being romantic. There are real, practical things we can learn from these texts. The challenge is that there are still so many manuscripts that haven't been read. Some are in poor condition, some are in private collections that are hard to access. But every time one is opened and translated, it's like adding a new piece to a puzzle we didn't even know existed. Luna: It makes you wonder what else is out there, waiting to be found. Lucas: That's the exciting part. And it's why I think the story of Timbuktu's astronomy is really a story about resilience — the resilience of knowledge itself. Despite wars, climate shifts, and the passage of centuries, those star tables survived. And now, in the 21st century, we're finally giving them the attention they deserve. Luna: I'm glad we're doing that. It feels like a small act of justice. Lucas: Yeah, I think so too. And it's a reminder that history isn't just about the past — it's about what we choose to remember and carry forward. Al-Wangari and his colleagues looked at the stars and saw order, meaning, and a way to navigate the world. We can still do the same.