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Bradley, James

Born: 1693 AD
Died: 1762 AD
Nationality: British
Categories: Astronomers

1963 –  An English astronomer was born

1729 – By observing seasonal elliptical motion of apparent position of gamma Draconis, discovered astronomical aberration of light.

1727-1747 – By observing that apparent stellar positions slightly vary with same periodicity as lunar nodes, he discovered nutation of Earth (oscillation of Earth’s axis, due to changing direction of Moon’s gravitational attraction acting on Earth’s equatorial bulge)