Halley's comet, October 1835.
© Science Museum / Science & Society Picture Library
Illustrations of the comet as seen from the Tartu observatory in Estonia, on 14 and 27 October 1835. The famous comet of 76-year periodicity, observed in 1583 and posibly earlier, is named after Astronomer Royal Edmond Halley (1656-1742) who correctly predicted its return in 1758, 1835 and 1910. Plate from 'Beobachtungen des Halleyschen Cometen' ('Observations on Halley's Comet'), by F G W Struve (1793-1864), published in St Petersburg in 1839.