Answer
FRS, FRSE, and FRAS are honorary designations Talbot held from scientific societies. FRS stands for Fellow of the Royal Society, an esteemed British scientific academy recognizing exceptional contributions to science. FRSE represents Fellow of the Royal Society of Edinburgh, another prestigious Scottish society honoring scientific achievements. Lastly, FRAS signifies Fellow of the Royal Astronomical Society, acknowledging Talbot's contributions to astronomy and related fields.