Paper, 'On the problem of three bodies' by Rev J [James] Challis Subject: Astronomy Published in Philosophical Transactions as 'On the problem of three bodies'. Written by Challis at the Cambridge Observatory. Received by the Royal Society on 15 May 1856. Read 22 May 1856. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 8, 1857. 10 May 1856