Halley's Comet Was Spotted By Ancient Greeks

Halley's Comet and Others May Be Stolen Goods
The detailed tail photograph of Halley's Comet was obtained by Jet Propulsion Laboratory astronomer Eleanor Helin with the 48-inch Schmidt telescope at Caltech's Palomar Observatory on Dec. 13, 1985. (Image credit: NASA/JPL-Caltech)
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Mike Wall
Senior Space Writer

Michael Wall is a Senior Space Writer with Space.com and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.