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Both objects display similar sizes, densities, and atmospheric and surface ice composition, with the presence of volatile ices N\n                    <jats:sub>2<\/jats:sub>\n                    , CH\n                    <jats:sub>4<\/jats:sub>\n                    , and CO. Yet their appearance, including their surface albedo and ice distribution strongly differ. What can explain these different appearances? A first disparity is that Triton is experiencing significant tidal heating due to its orbit around Neptune, with subsequent resurfacing and a relatively flat surface, while Pluto is not tidally activated and displays a pronounced topography. Here we present long-term volatile transport simulations of Pluto and Triton, using the same initial conditions and volatile inventory, but with the known orbit and rotation of each object. The model reproduces, to first order, the observed volatile ice surface distribution on Pluto and Triton. Our results unambiguously demonstrate that obliquity is the main driver of the differences in surface appearance and in climate properties on Pluto and Triton, and give further support to the hypothesis that both objects had a common origin followed by a different dynamical history.\n                  <\/jats:p>","DOI":"10.1073\/pnas.2408226121","type":"journal-article","created":{"date-parts":[[2024,8,12]],"date-time":"2024-08-12T15:03:11Z","timestamp":1723474991000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":2,"title":["How obliquity has differently shaped Pluto\u2019s and Triton\u2019s landscapes and climates"],"prefix":"10.1073","volume":"121","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2302-9776","authenticated-orcid":false,"given":"Tanguy","family":"Bertrand","sequence":"first","affiliation":[{"name":"Laboratoire d\u2019\u00c9tudes Spatiales et d\u2019Instrumentation en Astrophysique, Observatoire de Paris, Universit\u00e9 Paris Sciences &amp; Lettres, CNRS, Sorbonne Universit\u00e9, University of Paris Diderot, Sorbonne Paris Cit\u00e9, Meudon 92195, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fran\u00e7ois","family":"Forget","sequence":"additional","affiliation":[{"name":"Laboratoire de M\u00e9t\u00e9orologie Dynamique, Institut Pierre-Simon Laplace, CNRS, Sorbonne Universit\u00e9, \u00c9cole Normale Sup\u00e9rieure, Universit\u00e9 Paris Science et Lettres, Ecole Polytechnique, Institut Polytechnique de Paris, Paris 75005, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emmanuel","family":"Lellouch","sequence":"additional","affiliation":[{"name":"Laboratoire d\u2019\u00c9tudes Spatiales et d\u2019Instrumentation en Astrophysique, Observatoire de Paris, Universit\u00e9 Paris Sciences &amp; Lettres, CNRS, Sorbonne Universit\u00e9, University of Paris Diderot, Sorbonne Paris Cit\u00e9, Meudon 92195, France"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2024,8,12]]},"reference":[{"key":"e_1_3_4_1_2","doi-asserted-by":"publisher","DOI":"10.1086\/109967"},{"key":"e_1_3_4_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/311355a0"},{"key":"e_1_3_4_3_2","doi-asserted-by":"publisher","DOI":"10.1016\/0273-1177(90)90105-9"},{"key":"e_1_3_4_4_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.261.5122.742"},{"key":"e_1_3_4_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.261.5122.745"},{"key":"e_1_3_4_6_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2018.06.008"},{"key":"e_1_3_4_7_2","doi-asserted-by":"publisher","DOI":"10.3390\/rs13173476"},{"key":"e_1_3_4_8_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.250.4979.437"},{"key":"e_1_3_4_9_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2007.07.004"},{"key":"e_1_3_4_10_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.aad1815"},{"key":"e_1_3_4_11_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.aad7055"},{"key":"e_1_3_4_12_2","doi-asserted-by":"crossref","unstructured":"K. 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R. Spencer \u201cVolatile transport seasonal cycles and atmospheric dynamics on Pluto\u201d in Pluto and Charon A. Stern D. J. Tholen Eds. (University of Arizona Press 1997) p. 435."},{"key":"e_1_3_4_63_2","doi-asserted-by":"publisher","DOI":"10.1051\/0004-6361\/201834281"},{"key":"e_1_3_4_64_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2016.11.012"},{"key":"e_1_3_4_65_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2011.05.035"},{"key":"e_1_3_4_66_2","first-page":"45-01","article-title":"\u201cA new model for the seasonal evolution of Triton\u201d","volume":"32","author":"Forget F.","year":"2000","unstructured":"F. Forget, N. Decamp, J. Berthier, C. Le Guyader, \u201cA new model for the seasonal evolution of Triton\u201d in AAS\/Division for Planetary Sciences Meeting Abstracts# 32 (2000), vol. 32, p. 45-01.","journal-title":"AAS\/Division for Planetary Sciences Meeting Abstracts# 32"},{"key":"e_1_3_4_67_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.pss.2009.09.011"},{"key":"e_1_3_4_68_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2014.05.022"},{"key":"e_1_3_4_69_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.icarus.2016.11.028"},{"key":"e_1_3_4_70_2","doi-asserted-by":"crossref","unstructured":"T. Bertrand Twin worlds divergent fates: How obliquity has differently shaped Pluto\u2019s and Triton\u2019s landscapes and climates. Zenodo. https:\/\/zenodo.org\/records\/11083083. 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