Dougherty left South Africa for a fellowship in Germany, working on applied mathematics, before moving to Imperial College London in 1991. She was head of the
Department of Physics at
Imperial College London from 2018 to 2024. Dougherty's work led to the discovery of an
atmosphere containing water and
hydrocarbons around Saturn's moon
Enceladus — opening up new possibilities in the search for
extraterrestrial life. Dougherty is distinguished by the
Royal Society "for her scientific leadership of the international
NASA-ESA-
ASI Cassini-Huygens mission to Saturn and its moons". As principal investigator of the operation, data collection and analysis of observations from the magnetic field instrument on board the Cassini spacecraft, she strongly contributed to improve our understanding of Saturn and the
Moons of Saturn. Dougherty cites the flybys of Saturn's moons as a highlight of her career; convincing the NASA spacecraft team to make a closer than usual approach “I watched the data coming back with my heart in my mouth because if we had messed up no one would have ever believed me again!". Before working on the Cassini-Huygens spacecraft, Dougherty was involved in the magnetometer team for the Jupiter analysis of the
Ulysses mission. She was also Guest Investigator on the NASA Jupiter System Data Analysis Program as part of the
Galileo uncrewed spacecraft. Dougherty regularly delivers public lectures and appears on national media. She was one of the guest scientists interviewed on
Jim Al-Khalili's radio programme
The Life Scientific. In July 2025 Dougherty was appointed the UK's
Astronomer Royal. She is the first woman in the post's 350-year history. ==Awards and honours==