Editing 1729 in science (section)

==Astronomy==
* January 9 & 16 – [[James Bradley]], in a letter written to [[Edmond Halley]] and read before the [[Royal Society]], describes his discovery of [[aberration of starlight]].<ref>Date clarified in: {{cite journal|first=George|last=Sarton|authorlink=George Sarton|journal=[[Isis (journal)|Isis]]|volume=16|issue=2|title=Discovery of the Aberration of Light|jstor=224710|issn=0021-1753|date=November 1931|pages=233–265 |doi=10.1086/346611}}</ref>
* August 1 – Fr. [[Nicolas Sarrabat]], a professor of mathematics at [[Marseille]], discovers the [[Comet of 1729]], possibly the largest comet, with the highest [[apparent magnitude]], on record.
* English [[optician]] [[Chester Moore Hall]] ([[1703 in science|1703]]–[[1771 in science|1771]]) develops an [[achromatic lens]] (or achromat) commonly used as the objective of small [[refracting telescope]]s.