• Born date: 1803-12-12
  • Born in: Braintree, Essex
  • Death date: 1882-12-03
  • Death in: Cambridge
James Challis

James Challis FRS (12 December 1803 – 3 December 1882) was an English clergyman, physicist and astronomer. Plumian Professor and director of the Cambridge Observatory, he investigated a wide range of physical phenomena though made few lasting contributions outside astronomy. He is best remembered for his missed opportunity to discover the planet Neptune in 1846.