Edmond (or Edmund) Halley, FRS (pronounced ; 8 November [O.S. 29 October] 1656 25 January 1742 [O.S. 14 January 1741] ) was an English astronomer, geophysicist, mathematician, meteorologist, and physicist who is best known for computing the orbit of Halley's Comet. He was the second Astronomer Royal in Britain, succeeding John Flamsteed.

Can we draw the following conclusion?
Edmon had more than one specialization in his carreer
Yes