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The Planet Nine hypothesis

Brown, Michael E. (2019) The Planet Nine hypothesis. Physics Today, 72 (3). pp. 70-71. ISSN 0031-9228. https://resolver.caltech.edu/CaltechAUTHORS:20190313-160836642

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Abstract

In 1820 Alexis Bouvard, the director of the Paris Observatory, made what could have been a huge discovery. The planet Uranus, whose position he had tracked back 130 years in old star catalogs, didn’t quite go around the Sun the way that he predicted it should. It traveled along its elliptical orbit as expected, but sometimes the old observations suggested it was a little ahead of its predicted position and sometimes a little behind. Bouvard might have realized that there was something beyond Uranus, but instead he was convinced the old star catalogs were simply wrong.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1063/PT.3.4172DOIArticle
ORCID:
AuthorORCID
Brown, Michael E.0000-0002-8255-0545
Additional Information:© 2019 American Institute of Physics.
Group:Astronomy Department
Issue or Number:3
Record Number:CaltechAUTHORS:20190313-160836642
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190313-160836642
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:93794
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:13 Mar 2019 23:21
Last Modified:20 Apr 2020 08:47

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