Brown, Michael E. (2019) The Planet Nine hypothesis. Physics Today, 72 (3). pp. 70-71. ISSN 0031-9228. doi:10.1063/PT.3.4172. 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 | ||||||
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Additional Information: | © 2019 American Institute of Physics. | ||||||
Group: | Astronomy Department | ||||||
Issue or Number: | 3 | ||||||
DOI: | 10.1063/PT.3.4172 | ||||||
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: | 16 Nov 2021 17:00 |
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