A pencil sketch discovered in a notebook at the National Library of Scotland has rekindled interest in the historic Thiruvananthapuram Observatory’s pivotal role in geomagnetic research.
The sketch, depicting a magnetic observatory once located in Cherthala, was unearthed by a research team led by Prof. R. Jayakrishnan, the present director of the Observatory (then the Trivandrum Observatory).
This discovery prompted a detailed i
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