Sicardy, B.Widemann, T.Lellouch, E.Veillet, C.Cuillandre, J. -C.Colas, F.Roques, F.Beisker, W.Kretlow, M.Lagrange, A. -M.Gendron, E.Lacombe, F.Lecacheux, J.Birnbaum, C.Fienga, A.Leyrat, C.Maury, A.Raynaud, E.Renner, S.Schultheis, M.Brooks, K.Delsanti, A.Hainaut, O. R.Gilmozzi, R.Lidman, C.Spyromilio, J.Rapaport, M.Rosenzweig, P.Naranjo, O.Porras, L.Díaz, F.Calderón, H.Carrillo, S.Carvajal, A.Recalde, E.Cavero, L. GaviriaMontalvo, C.Barría, D.Campos, R.Duffard, R.Levato, H.2025-12-172025-12-170028-0836RIS:urn:2FCFBF0520774F7DF891A656B9C42B66https://hdl.handle.net/1885/733795901Pluto's tenuous nitrogen atmosphere was first detected by the imprint left on the light curve of a star that was occulted by the planet in 1985 (ref. 1), and studied more extensively during a second occultation event in 1988 (refs 2-6). These events are, however, quite rare and Pluto's atmosphere remains poorly understood, as in particular the planet has not yet been visited by a spacecraft. Here we report data from the first occultations by Pluto since 1988. We find that, during the intervening 14 years, there seems to have been a doubling of the atmospheric pressure, a probable seasonal effect on Pluto.3en2003-07-0110.1038/nature017660038004459