On October 10, 1846, William Lassell discovered Triton, a moon of Neptune. Lassell was a merchant by trade and an amateur astronomer. He is known for making significant improvements to the design of the reflecting telescope. It was the improved optics of his 48 inch scope (and its location) that allowed him to discover Triton.
Other events that occurred on October 10 include:
World Space Week runs from October 4 – 10, 2017.
Check back tomorrow for another great World Space Week Space Fact.