Keywords: EB1911 - Comet Fig. 4.—Halley’s Comet, 1910.jpg en EB1911 - Comet Fig 4 ”Halley ™s Comet 1910 1911-01-01 1911 Encyclopædia Britannica Comet article; Vol 6 Edward Emerson Barnard other versions PD-old-70-1923 Comet Halley Images from the 1911 Encyclopædia Britannica volume 6 |