{"paper":{"title":"An Earth-sized planet with an Earth-like density","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"astro-ph.EP","authors_text":"Aldo F. M. Fiorenzano, Aldo S. Bonomo, Alessandro Sozzetti, Andrew Collier Cameron, Andrew Szentgyorgyi, Avet Harutyunyan, Christophe Lovis, Christopher A. Watson, Courtney D. Dressing, Damien S\\'egransan, David Charbonneau, David Phillips, David W. Latham, Didier Queloz, Dimitar Sasselov, Don Pollacco, Emilio Molinari, Fatemeh Motalebi, Francesco Pepe, Giampaolo Piotto, Giusi Micela, Keith Horne, Ken Rice, Lars A. Buchhave, Luca Malavolta, Mercedes Lopez-Morales, Michel Mayor, Pedro Figueira, Rapha\\\"elle D. Haywood, Rosario Cosentino, Sara Gettel, St\\'ephane Udry, Valerio Nascimbeni, Xavier Dumusque","submitted_at":"2013-10-30T00:07:15Z","abstract_excerpt":"Kepler-78 (KIC 8435766) was identified by Sanchis-Ojeda et al. (2013) as harbouring a transiting planet of 1.16 times the size of the Earth and an orbital period of only 8.5 hours. While the exquisite Kepler photometry was able to determine its radius and period, the mass of the planet (and thus its mean density) remained unconstrained in the absence of precise radial-velocity measurements. Here we present an accurate mass measurement of Kepler-78b using the HARPS-N spectrograph, recently installed on the Telescopio Nazionale Galileo (INAF) at the Roque de los Muchachos Observatory, La Palma, "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.7987","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}