Paper, 'Helio-cometes et seleno-cometes' [The Sun-comet and the Moon-comet] by Johann Christoph Sturm Account of an appearance of the Sun and Moon emitting long tails streaching to the horizon. Observed on 8 December at Altorff near to Nurnberg [Germany]. Phenomenon lasted all night, the sun arising the next morning with a similar tail. Includes drawings of the comets. Subject: Astronomy Read to the Royal Society 2 April 1689 1689