Complex sentence: Until 1839, the Savilian Chair of Astronomy was responsible for the observatory, at this date the appointment of George Henry Sacheverell Johnson an astronomer with no observational experience caused the creation of the new role of Radcliffe Observer.
Split into simpler sentences: Until 1839, the Savilian Chair of Astronomy was responsible for the observatory. At this date the appointment of George Henry Sacheverell Johnson an astronomer with no observational experience caused the creation of the new role of Radcliffe Observer.