Charles Jasper Joly FRS FRAS MRIA was an Irish mathematician and astronomer who was Andrews Professor of Astronomy from 1897 until his death in 1906. He was an important figure in the study of quaternions.
- Occupation
- mathematician, astronomer
- Position held
- Andrews Professor of Astronomy, chairperson
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- June 27, 1864
- Died
- January 4, 1906
