John Hadley, Date of Birth, Place of Birth, Date of Death

John Hadley

English mathematician and astronomer

Date of Birth: 16-Apr-1682

Place of Birth: Hertfordshire, England, United Kingdom

Date of Death: 14-Feb-1744

Profession: astronomer, mathematician, inventor

Zodiac Sign: Aries

John Hadley (16 April 1682 – 14 February 1744) was an English mathematician, and laid claim to the invention of the octant, two years after Thomas Godfrey claimed the same.