Sir Robert Stawell Ball was an Irish astronomer who founded the screw theory. He was Royal Astronomer of Ireland at Dunsink Observatory.
- Occupation
- astronomer, mathematician, university teacher, writer
- Position held
- Lowndean Professor of Astronomy and Geometry, Royal Astronomer of Ireland, President of the Royal Astronomical Society, chairperson
- Citizenship
- United Kingdom of Great Britain and Ireland
- Born
- July 1, 1840, 1840
- Died
- November 25, 1913, 1913