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Brown/pale yellow observation of sunspots made by John Willis on 9 July 1882 at 11:40. On the reverse Willis has noted: "There was a remarkable absence of spots when this observation was made, faculae being the only visible feature. JW. 9.7.82." Faculae are areas of greater brightness on the Sun that are hotter; sunspots are cooler. One of 275 pencil, ink and colour wash observations of the Sun and Jupiter made by Willis in Folkestone between 1879 and 1906.
Title
Brown/pale yellow observation of the Sun, 9 July 1882
Date
1882
Medium
paper, pencil, ink, col. wash
Accession number
2001-769/35
Acquisition method
Sotheby's (Olympia)
Work type
Drawing