Hendricus Gerardus van de Sande Bakhuyzen was a Dutch astronomer. His surname, van de Sande Bakhuyzen, is sometimes erroneously given as Backhuyzen or Bakhuysen. His first name is sometimes given as Hendrik Gerard.
He studied astronomy under... Wikipedia
Born: April 2, 1838, The Hague, Netherlands
Died: January 8, 1923 (age 84 years), Leiden, Netherlands