Charles Joly was a native of Co Offaly, Ireland. He was a mathematician and astronomer. He served as Professor of Astronomy at Trinity College Dublin until his appointment as Royal Astronomer of Ireland 1897.
Charles Jasper Joly was born in Tullamore Co Offaly in 1864. He was educated at the Erasmus Smith Grammar School on College Road in Galway City before entering Trinity College Dublin. He served as Andrews Professor of Astronomy at Trinity College until 1897. He was then appointed Royal Astronomer of Ireland at Dunsink Observatory.
The Dunsink Observatory is located about 8km northwest of Dublin city centre. It was established in 1785. In 1900 Joly was a leading member of the major expedition to Spain for the Total Eclipse of that year. The purpose of the visit was to photograph the sun’s corona. Joly died of typhoid on January 4th at the age of 42.
Charles Joly was born in the year 1864 On This Day.

Photo by john.purvis
The South Dome, Dunsink Observatory, Dublin