Abstract
We summarize the first results from the Herschel Open time Key Program GaS in Protoplanetary Systems (GASPS, P.I.W. Dent). GASPS aims to determine the gas and dust content of ~240 planet-forming discs with ages 1–30 Myrs in a systematic fashion. Photometry in the far-IR and low-resolution spectroscopy of the fine-structure emissions of OI and CII are obtained with the PACS instrument on board the European space telescope Herschel. Initial modelling of the Herschel and complementary observations of the classical T Tauri star TW Hya and of the Herbig Ae star HD 169142 are presented.
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