This text is missing some spaces, please add them: Delaunaypublishedfurtherpapersonastronomy,publishingseveralpapersonperturbationsofUranusin1842and1843andafterthishisfirstworkonthetheoryoftides.
Delaunay published further papers on astronomy, publishing several papers on perturbations of Uranus in 1842 and 1843 and after this his first work on the theory of tides.