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Thomas Street

Thomas Street
Born 5 March 1621 (probably unadjusted)
Castlelyons, Ireland
Died 17 August 1689 (probably unadjusted)
Westminster, London, England
Nationality English
Fields Astronomy
Known for Astronomia Carolina
Influences Johannes Kepler
Influenced Isaac Newton, John Flamsteed

Thomas Street (also spelled Streete) (1621–1689) was an English astronomer, known for his writings on celestial motions. He has sometimes been confused with Thomas Street the judge, who lived from 1626 to 1696. The crater Street on the Moon is named after him.

According to Brief Lives by Street's contemporary John Aubrey, Street was born at Castle Lyons in Ireland on 5 March 1621, and died "in Chanon-row (vulgarly Channel-rowe) at Westminster, the 17th August, 1689, and is buried in the church yard of the new chapell there".

In 1661, Street published Astronomia Carolina, a new theorie of Coelestial Motions. An Appendix to Astronomia Carolina (including tables) followed in 1664. Astronomia Carolina was widely read, and used by students who later became very notable in their own right, e.g. Isaac Newton and John Flamsteed. It was from Astronomia Carolina that Flamsteed learned how to calculate eclipses and planetary positions. Street's tables in Astronomia Carolina had a reputation for accuracy: for example, Flamsteed once referred to them as "the exactest tables in being, the Caroline", and Astronomia Carolina itself appeared in second and third editions as late as 1710 and 1716.

1674 saw the appearance of Street's Description and Use of the Planetary Systeme together with Easie Tables, as well as, in the same year, Tables of Projection for artillery, accompanying a work on gunnery by Robert Anderson.

A follower of Johannes Kepler, Street argued, like Kepler, that Earth's rate of daily rotation is not uniform. He argued that the rotation increased as it approached the Sun.

Street invented an improved back-staff, a modification of an earlier instrument by Robert Hooke, adding to the device two planes and a small mirror.


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