page_title: 1759 in science
section_title: Astronomy
hierarchical_section_title: 1759 in science / Astronomy
caption_attribution_description: English: Photograph of John Harrison's H4 clock. Low resolution for illustrative purposes only, and to discourage potential commercial use. Shot without flash, 800 ASA setting.
context_page_description: The year 1759 in science and technology involved several significant events.
context_section_description: Halley's comet returns; a team of three mathematicians, Alexis Clairaut, Jérome Lalande and Nicole Reine Lepaute, had—for the first time—predicted the date.
caption: Harrison's marine chronometer
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