James Bradley was third Astronomer Royal from 1742. He is best known for two fundamental discoveries in astronomy, the aberration of light (an astronomical phenomenon which produces an apparent motion of celestial objects about their real locations) and the nutation, or movement, of the Earth's axis.[1]
"We may in fact salute James Bradley, on the occasion of the bicentenary of his death, as the greatest astronomer who has ever held the office of Astronomer Royal in nearly three centuries" - Sir Richard Woolley, 1963.[2]
James Bradley was born in 1692 at Sherborne, near Cheltenham in Gloucestershire, to William Bradley and Jane Pound.
He was baptised James, son of William and Jane Bradley on 3 October 1692 in Sherborne, Gloucestershire.[3]
He enrolled in Balliol College, Oxford, in 1711 with the intent of becoming a minister, graduating with a B.A. degree in 1714 and a M.A degree in 1717.
Bradley was elected a fellow of the Royal Society on 6 November 1718.
He became vicar of Bridstow in Herefordshire in 1719.
He resigned his ecclesiastical preferments in 1721, when appointed to the Savilian chair of astronomy at Oxford.
Between 1725 and 1726 he worked with Samuel Molyneux, at Kew, England, where he observed the apparent displacement of Gamma Draconis (a star in the constellation Draco) when he measured its distance to the Earth, leading him to discover the aberration of light.
From 1727 he conducted observations of the Earth's moon, from which he discovered nutation of the Earth's axis.
As reader on experimental philosophy from 1729 to 1760, he delivered 79 courses of lectures at the Ashmolean Museum.
In 1742, Bradley was appointed to succeed Edmond Halley as Astronomer Royal.
Bradley retired in broken health, nine years later, to Chalford in Gloucestershire.
[1][4]
Marriage: He married Susannah Peach at Minchinhampton, Gloucestershire on 25 June 1744. The parish register recorded: "Dr James Bradley & Mrs Susannah Peach".[5] His biographies usually state that Susannah was a daughter of Mr Samuel Peach of Chalford in in Minchinhampton, however she was probably a daughter in law (see Research Notes below). She died in 1757 leaving a daughter Susannah born at Greenwich in 1745 who in 1771 married the Rev. Samuel Peach, and their only daughter died childless in 1806.[6]
Death: James Bradley died at the house of Samuel Peach, Skiveralls House, in Chalford in the parish of Minchinhampton, Gloucestershire on 13 July 1762. Samuel Peach was incorrectly[?] referred to as his "father-in-law" in his biographies.[7]
He was buried at the parish churchyard in Minchinhampton, Gloucestershire.[4]
The church has a brass plaque with an inscription in Latin which has been translated:
He wrote his will in 1761: "James Bradley of Greenwich in the County of Kent. D.D.". It was proved on 1 September 1762. [10]
James Bradley in his will of 1761 wrote: "Samuel Peach of Chalford in the parish of Minchinhampton, clothier and Mary his wife my sister-in-law". This implies that James Bradley's wife Susanna was the sister of Samuel Peach's wife Mary. More precisely, she was probably the widow of a brother of Mary Peach, because she was referred to as "Mrs Susanna Peach" in their marriage registration. I have not been able to find more about this branch of the Peach family - if anyone has more information I would appreciate it if they could contact me - Heather
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Categories: Copley Medal | Fellows of the Royal Society | Astronomers | Gloucestershire, Notables | Notables