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Sicardy B Widemann T Lellouch E Veillet C Cuillandre JC Colas F Roques F Beisker W Kretlow M Lagrange AM 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 OR 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 LG Montalvo C Barría D Campos R Duffard R Levato H 《Nature》2003,424(6945):168-170
Pluto'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. 相似文献
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