Comet Lore

Halley's Comet appears in our skies every 75—76 years. It is the only known comet that is regularly visible to the naked eye from Earth, and the only naked-eye comet that can appear twice in a human lifetime. The regular visits from Halley's Comet have been observed and recorded by astronomers around the world since at least 240 BC, but it was in 1705 that English astronomer Edmond Halley discovered that these sightings were reappearances of the same comet. This illustrated 1910 book by Edwin Emerson explores the history of the comet named after Halley, and its relevance to human history.