James Bradley

Bradley by [[Thomas Hudson (painter)|Thomas Hudson]], {{circa|1744}} James Bradley (September 1692 – 13 July 1762) was an English astronomer and priest who served as the third Astronomer Royal from 1742. He is best known for two fundamental discoveries in astronomy, the aberration of light (1725–1728), and the nutation of the Earth's axis (1728–1748).

These two discoveries were called "the most brilliant and useful of the century" by Jean Baptiste Joseph Delambre, historian of astronomy, mathematical astronomer and director of the Paris Observatory. In his ''History of astronomy in the 18th century'' (1821), Delambre stated:
"It is to these two discoveries by Bradley that we owe the exactness of modern astronomy. ... This double service assures to their discoverer the most distinguished place (after Hipparchus and Kepler) above the greatest astronomers of all ages and all countries."
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    by Bradley, James, 1967-
    Published 1998

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    by Bradley, James, 1967-
    Published 1998

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    by Bradley, James, 1967-
    Published 1994

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    by Bradley, James, 1967-
    Published 2007

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    by Bradley, James, 1967-
    Published 2007

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    by Bradley, James, 1967-
    Published 1999

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    by Bradley, James, 1967-
    Published 1999

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    Published 1996
    Other Authors: ...Bradley, James, 1967-...

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    Other Authors: ...Bradley, James, 1967-...

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