Mustill, Alexander J.; Raymond, Sean N.; Davies, Melvyn B. (21 July 2016). “Is there an exoplanet in the Solar System?”. Monthly Notices of the Royal Astronomical Society: Letters460 (1): L109–L113. arXiv:1603.07247. Bibcode: 2016MNRAS.460L.109M. doi:10.1093/mnrasl/slw075.
Eriksson, Linn E. J.; Mustill, Alexander J.; Johansen, Anders (2017). “Circularizing Planet Nine through Dynamical Friction with an Extended, Cold Planetesimal Belt”. Monthly Notices of the Royal Astronomical Society475 (4): 4609. arXiv:1710.08295. Bibcode: 2018MNRAS.475.4609E. doi:10.1093/mnras/sty111.
Parker, Richard J.; Lichtenberg, Tim; Quanz, Sascha P. (2017). “Was Planet 9 Captured in the Sun's Natal Star-Forming Region?”. Monthly Notices of the Royal Astronomical Society: Letters472 (1): L75–L79. arXiv:1709.00418. Bibcode: 2017MNRAS.472L..75P. doi:10.1093/mnrasl/slx141.
Gomes, Rodney; Deienno, Rogerio; Morbidelli, Alessandro (2016). “The Inclination of the Planetary System Relative to the Solar Equator May Be Explained by the Presence of Planet 9”. The Astronomical Journal153 (1): 27. arXiv:1607.05111. Bibcode: 2017AJ....153...27G. doi:10.3847/1538-3881/153/1/27.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2014). “Extreme Trans-Neptunian Objects and the Kozai Mechanism: Signalling the Presence of Trans-Plutonian Planets”. Monthly Notices of the Royal Astronomical Society Letters443 (1): L59–L63. arXiv:1406.0715. Bibcode: 2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084.
Becker, Juliette C.; Adams, Fred C.; Khain, Tali; Hamilton, Stephanie J.; Gerdes, David (2017). “Evaluating the Dynamical Stability of Outer Solar System Objects in the Presence of Planet Nine”. The Astronomical Journal154 (2): 61. arXiv:1706.06609. Bibcode: 2017AJ....154...61B. doi:10.3847/1538-3881/aa7aa2.
Lawler, S. M.; Shankman, C.; Kaib, N.; Bannister, M. T.; Gladman, B.; Kavelaars, J. J. (2016-12-29). “Observational Signatures of a Massive Distant Planet on the Scattering Disk”. The Astronomical Journal153 (1): 33. arXiv:1605.06575. Bibcode: 2017AJ....153...33L. doi:10.3847/1538-3881/153/1/33.
Bernardinelli, Pedro H.; Bernstein, Gary M.; Sako, Masao; Liu, Tongtian; Saunders, William R.; Khain, Tali; Lin, Hsing Wen; Gerdes, David W. et al. (2020). “Trans-Neptunian Objects Found in the First Four Years of the Dark Energy Survey”. The Astrophysical Journal Supplement Series247 (1): 32. arXiv:1909.01478. Bibcode: 2020ApJS..247...32B. doi:10.3847/1538-4365/ab6bd8.
Madigan, Ane-Marie; McCourt, Michael (2016). “A New Inclination Instability Reshapes Keplerian Discs into Cones: Application to the Outer Solar System”. Monthly Notices of the Royal Astronomical Society: Letters457 (1): L89–93. arXiv:1509.08920. Bibcode: 2016MNRAS.457L..89M. doi:10.1093/mnrasl/slv203.
Sefilian, Antranik A.; Touma, Jihad R. (2019). “Shepherding in a Self-gravitating Disk of Trans-Neptunian Objects”. The Astronomical Journal157 (2): 59. arXiv:1804.06859. doi:10.3847/1538-3881/aaf0fc.
Jílková, Lucie; Portegies Zwart, Simon; Pijloo, Tjibaria; Hammer, Michael (2015). “How Sedna and Family Were Captured in a Close Encounter with a Solar Sibling”. Monthly Notices of the Royal Astronomical Society453 (3): 3157–3162. arXiv:1506.03105. Bibcode: 2015MNRAS.453.3157J. doi:10.1093/mnras/stv1803.
Meisner, Aaron M.; Bromley, Benjamin B.; Nugent, Peter E.; Schlegel, David J; Kenyon, Scott J.; Schlafly, Edward F.; Dawson, Kyle S. (2016). “Searching for Planet Nine with Coadded WISE and NEOWISE-Reactivation Images”. The Astronomical Journal153 (2): 65. arXiv:1611.00015. Bibcode: 2017AJ....153...65M. doi:10.3847/1538-3881/153/2/65.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Finding Planet Nine: Apsidal Anti-Alignment Monte Carlo Results”. Monthly Notices of the Royal Astronomical Society462 (2): 1972–1977. arXiv:1607.05633. Bibcode: 2016MNRAS.462.1972D. doi:10.1093/mnras/stw1778.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Commensurabilities between ETNOs: a Monte Carlo survey”. Monthly Notices of the Royal Astronomical Society Letters460 (1): L64–L68. arXiv:1604.05881. Bibcode: 2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077.
Mustill, Alexander J.; Raymond, Sean N.; Davies, Melvyn B. (21 July 2016). “Is there an exoplanet in the Solar System?”. Monthly Notices of the Royal Astronomical Society: Letters460 (1): L109–L113. arXiv:1603.07247. Bibcode: 2016MNRAS.460L.109M. doi:10.1093/mnrasl/slw075.
Eriksson, Linn E. J.; Mustill, Alexander J.; Johansen, Anders (2017). “Circularizing Planet Nine through Dynamical Friction with an Extended, Cold Planetesimal Belt”. Monthly Notices of the Royal Astronomical Society475 (4): 4609. arXiv:1710.08295. Bibcode: 2018MNRAS.475.4609E. doi:10.1093/mnras/sty111.
Parker, Richard J.; Lichtenberg, Tim; Quanz, Sascha P. (2017). “Was Planet 9 Captured in the Sun's Natal Star-Forming Region?”. Monthly Notices of the Royal Astronomical Society: Letters472 (1): L75–L79. arXiv:1709.00418. Bibcode: 2017MNRAS.472L..75P. doi:10.1093/mnrasl/slx141.
Gomes, Rodney; Deienno, Rogerio; Morbidelli, Alessandro (2016). “The Inclination of the Planetary System Relative to the Solar Equator May Be Explained by the Presence of Planet 9”. The Astronomical Journal153 (1): 27. arXiv:1607.05111. Bibcode: 2017AJ....153...27G. doi:10.3847/1538-3881/153/1/27.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2014). “Extreme Trans-Neptunian Objects and the Kozai Mechanism: Signalling the Presence of Trans-Plutonian Planets”. Monthly Notices of the Royal Astronomical Society Letters443 (1): L59–L63. arXiv:1406.0715. Bibcode: 2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084.
Becker, Juliette C.; Adams, Fred C.; Khain, Tali; Hamilton, Stephanie J.; Gerdes, David (2017). “Evaluating the Dynamical Stability of Outer Solar System Objects in the Presence of Planet Nine”. The Astronomical Journal154 (2): 61. arXiv:1706.06609. Bibcode: 2017AJ....154...61B. doi:10.3847/1538-3881/aa7aa2.
Lawler, S. M.; Shankman, C.; Kaib, N.; Bannister, M. T.; Gladman, B.; Kavelaars, J. J. (2016-12-29). “Observational Signatures of a Massive Distant Planet on the Scattering Disk”. The Astronomical Journal153 (1): 33. arXiv:1605.06575. Bibcode: 2017AJ....153...33L. doi:10.3847/1538-3881/153/1/33.
Bernardinelli, Pedro H.; Bernstein, Gary M.; Sako, Masao; Liu, Tongtian; Saunders, William R.; Khain, Tali; Lin, Hsing Wen; Gerdes, David W. et al. (2020). “Trans-Neptunian Objects Found in the First Four Years of the Dark Energy Survey”. The Astrophysical Journal Supplement Series247 (1): 32. arXiv:1909.01478. Bibcode: 2020ApJS..247...32B. doi:10.3847/1538-4365/ab6bd8.
Madigan, Ane-Marie; McCourt, Michael (2016). “A New Inclination Instability Reshapes Keplerian Discs into Cones: Application to the Outer Solar System”. Monthly Notices of the Royal Astronomical Society: Letters457 (1): L89–93. arXiv:1509.08920. Bibcode: 2016MNRAS.457L..89M. doi:10.1093/mnrasl/slv203.
Sefilian, Antranik A.; Touma, Jihad R. (2019). “Shepherding in a Self-gravitating Disk of Trans-Neptunian Objects”. The Astronomical Journal157 (2): 59. arXiv:1804.06859. doi:10.3847/1538-3881/aaf0fc.
Jílková, Lucie; Portegies Zwart, Simon; Pijloo, Tjibaria; Hammer, Michael (2015). “How Sedna and Family Were Captured in a Close Encounter with a Solar Sibling”. Monthly Notices of the Royal Astronomical Society453 (3): 3157–3162. arXiv:1506.03105. Bibcode: 2015MNRAS.453.3157J. doi:10.1093/mnras/stv1803.
Meisner, Aaron M.; Bromley, Benjamin B.; Nugent, Peter E.; Schlegel, David J; Kenyon, Scott J.; Schlafly, Edward F.; Dawson, Kyle S. (2016). “Searching for Planet Nine with Coadded WISE and NEOWISE-Reactivation Images”. The Astronomical Journal153 (2): 65. arXiv:1611.00015. Bibcode: 2017AJ....153...65M. doi:10.3847/1538-3881/153/2/65.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Finding Planet Nine: Apsidal Anti-Alignment Monte Carlo Results”. Monthly Notices of the Royal Astronomical Society462 (2): 1972–1977. arXiv:1607.05633. Bibcode: 2016MNRAS.462.1972D. doi:10.1093/mnras/stw1778.
Medvedev, Yu. D.; Vavilov, D. E.; Bondarenko, Yu. S.; Bulekbaev, D. A.; Kunturova, N. B. (2017). “Improvement of the Position of Planet X Based on the Motion of Nearly Parabolic Comets”. Astronomy Letters42 (2): 120–125. Bibcode: 2017AstL...43..120M. doi:10.1134/S1063773717020037.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Commensurabilities between ETNOs: a Monte Carlo survey”. Monthly Notices of the Royal Astronomical Society Letters460 (1): L64–L68. arXiv:1604.05881. Bibcode: 2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077.
Mustill, Alexander J.; Raymond, Sean N.; Davies, Melvyn B. (21 July 2016). “Is there an exoplanet in the Solar System?”. Monthly Notices of the Royal Astronomical Society: Letters460 (1): L109–L113. arXiv:1603.07247. Bibcode: 2016MNRAS.460L.109M. doi:10.1093/mnrasl/slw075.
Eriksson, Linn E. J.; Mustill, Alexander J.; Johansen, Anders (2017). “Circularizing Planet Nine through Dynamical Friction with an Extended, Cold Planetesimal Belt”. Monthly Notices of the Royal Astronomical Society475 (4): 4609. arXiv:1710.08295. Bibcode: 2018MNRAS.475.4609E. doi:10.1093/mnras/sty111.
Parker, Richard J.; Lichtenberg, Tim; Quanz, Sascha P. (2017). “Was Planet 9 Captured in the Sun's Natal Star-Forming Region?”. Monthly Notices of the Royal Astronomical Society: Letters472 (1): L75–L79. arXiv:1709.00418. Bibcode: 2017MNRAS.472L..75P. doi:10.1093/mnrasl/slx141.
Tombaugh, Clyde W. (1946). “The Search for the Ninth Planet, Pluto”. Astronomical Society of the Pacific Leaflets5: 73–80. Bibcode: 1946ASPL....5...73T.
Gomes, Rodney; Deienno, Rogerio; Morbidelli, Alessandro (2016). “The Inclination of the Planetary System Relative to the Solar Equator May Be Explained by the Presence of Planet 9”. The Astronomical Journal153 (1): 27. arXiv:1607.05111. Bibcode: 2017AJ....153...27G. doi:10.3847/1538-3881/153/1/27.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2014). “Extreme Trans-Neptunian Objects and the Kozai Mechanism: Signalling the Presence of Trans-Plutonian Planets”. Monthly Notices of the Royal Astronomical Society Letters443 (1): L59–L63. arXiv:1406.0715. Bibcode: 2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084.
Becker, Juliette C.; Adams, Fred C.; Khain, Tali; Hamilton, Stephanie J.; Gerdes, David (2017). “Evaluating the Dynamical Stability of Outer Solar System Objects in the Presence of Planet Nine”. The Astronomical Journal154 (2): 61. arXiv:1706.06609. Bibcode: 2017AJ....154...61B. doi:10.3847/1538-3881/aa7aa2.
Lawler, S. M.; Shankman, C.; Kaib, N.; Bannister, M. T.; Gladman, B.; Kavelaars, J. J. (2016-12-29). “Observational Signatures of a Massive Distant Planet on the Scattering Disk”. The Astronomical Journal153 (1): 33. arXiv:1605.06575. Bibcode: 2017AJ....153...33L. doi:10.3847/1538-3881/153/1/33.
Bernardinelli, Pedro H.; Bernstein, Gary M.; Sako, Masao; Liu, Tongtian; Saunders, William R.; Khain, Tali; Lin, Hsing Wen; Gerdes, David W. et al. (2020). “Trans-Neptunian Objects Found in the First Four Years of the Dark Energy Survey”. The Astrophysical Journal Supplement Series247 (1): 32. arXiv:1909.01478. Bibcode: 2020ApJS..247...32B. doi:10.3847/1538-4365/ab6bd8.
Madigan, Ane-Marie; McCourt, Michael (2016). “A New Inclination Instability Reshapes Keplerian Discs into Cones: Application to the Outer Solar System”. Monthly Notices of the Royal Astronomical Society: Letters457 (1): L89–93. arXiv:1509.08920. Bibcode: 2016MNRAS.457L..89M. doi:10.1093/mnrasl/slv203.
Jílková, Lucie; Portegies Zwart, Simon; Pijloo, Tjibaria; Hammer, Michael (2015). “How Sedna and Family Were Captured in a Close Encounter with a Solar Sibling”. Monthly Notices of the Royal Astronomical Society453 (3): 3157–3162. arXiv:1506.03105. Bibcode: 2015MNRAS.453.3157J. doi:10.1093/mnras/stv1803.
Meisner, Aaron M.; Bromley, Benjamin B.; Nugent, Peter E.; Schlegel, David J; Kenyon, Scott J.; Schlafly, Edward F.; Dawson, Kyle S. (2016). “Searching for Planet Nine with Coadded WISE and NEOWISE-Reactivation Images”. The Astronomical Journal153 (2): 65. arXiv:1611.00015. Bibcode: 2017AJ....153...65M. doi:10.3847/1538-3881/153/2/65.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Finding Planet Nine: Apsidal Anti-Alignment Monte Carlo Results”. Monthly Notices of the Royal Astronomical Society462 (2): 1972–1977. arXiv:1607.05633. Bibcode: 2016MNRAS.462.1972D. doi:10.1093/mnras/stw1778.
Medvedev, Yu. D.; Vavilov, D. E.; Bondarenko, Yu. S.; Bulekbaev, D. A.; Kunturova, N. B. (2017). “Improvement of the Position of Planet X Based on the Motion of Nearly Parabolic Comets”. Astronomy Letters42 (2): 120–125. Bibcode: 2017AstL...43..120M. doi:10.1134/S1063773717020037.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (2016). “Commensurabilities between ETNOs: a Monte Carlo survey”. Monthly Notices of the Royal Astronomical Society Letters460 (1): L64–L68. arXiv:1604.05881. Bibcode: 2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077.
Morton Grosser (1964). “The Search For A Planet Beyond Neptune”. Isis (journal)55 (2): 163–183. doi:10.1086/349825. JSTOR228182.
livescience.com
Wolchover, Natalie (2012年5月25日). “Planet X? New Evidence of an Unseen Planet at Solar System's Edge”. LiveScience. Purch. 2016年10月26日閲覧。 “More work is needed to determine whether Sedna and the other scattered disc objects were sent on their circuitous trips round the sun by a star that passed by long ago, or by an unseen planet that exists in the solar system right now. Finding and observing the orbits of other distant objects similar to Sedna will add more data points to astronomers' computer models.”
Totten, Sanden (2016年1月23日). “Planet 9: What should its name be if it's found?”. Science & Environment. Southern Californa Public Radio on 89.3 KPCC. 2016年6月14日閲覧。 ““We like to be consistent,” said Rosaly Lopes, a senior research scientist at NASA’s Jet Propulsion Laboratory and a member of the IAU’s Working Group for Planetary System Nomenclature. For a planet in our solar system, being consistent means sticking to the theme of giving them names from Greek and Roman mythology.（訳：NASA のジェット推進研究所に所属するシニア研究員であり IAU の天体命名作業部会に参加する Rosaly Lopes は「我々としては一貫性を保ちたい」と述べた。太陽系の惑星に関して言えば、一貫性を保つとは、つまりギリシャとローマの神話に因んだ名前をつけるという意味になる。）”
Wall, Mike (2016年2月4日). “'Planet Nine'? Cosmic Objects' Strange Orbits May Have a Different Explanation”. Space.com. 2016年2月8日時点のオリジナルよりアーカイブ。2016年2月8日閲覧。 “"We need more mass in the outer solar system," she (Madigan) said. "So it can either come from having more minor planets, and their self-gravity will do this to themselves naturally, or it could be in the form of one single massive planet — a Planet Nine. So it's a really exciting time, and we're going to discover one or the other."”
Grush, Loren (2016年1月20日). “Our Solar System May Have a Ninth Planet After All — but Not All Evidence Is in (We Still Haven't Seen It Yet)”. The Verge. オリジナルの2016年7月29日時点におけるアーカイブ。. https://web.archive.org/web/20160729141120/http://www.theverge.com/2016/1/20/10801824/ninth-planet-x-discovered-evidence2016年7月18日閲覧. "The statistics do sound promising, at first. The researchers say there's a 1 in 15,000 chance that the movements of these objects are coincidental and don't indicate a planetary presence at all. ... 'When we usually consider something as clinched and air tight, it usually has odds with a much lower probability of failure than what they have,' says Sara Seager, a planetary scientist at MIT. For a study to be a slam dunk, the odds of failure are usually 1 in 1,744,278. ... But researchers often publish before they get the slam-dunk odds, in order to avoid getting scooped by a competing team, Seager says. Most outside experts agree that the researchers' models are strong. And Neptune was originally detected in a similar fashion — by researching observed anomalies in the movement of Uranus. Additionally, the idea of a large planet at such a distance from the Sun isn't actually that unlikely, according to Bruce Macintosh, a planetary scientist at Stanford University."
Grush, Loren (2016年1月20日). “Our Solar System May Have a Ninth Planet After All — but Not All Evidence Is in (We Still Haven't Seen It Yet)”. The Verge. オリジナルの2016年7月29日時点におけるアーカイブ。. https://web.archive.org/web/20160729141120/http://www.theverge.com/2016/1/20/10801824/ninth-planet-x-discovered-evidence2016年7月18日閲覧. "The statistics do sound promising, at first. The researchers say there's a 1 in 15,000 chance that the movements of these objects are coincidental and don't indicate a planetary presence at all. ... 'When we usually consider something as clinched and air tight, it usually has odds with a much lower probability of failure than what they have,' says Sara Seager, a planetary scientist at MIT. For a study to be a slam dunk, the odds of failure are usually 1 in 1,744,278. ... But researchers often publish before they get the slam-dunk odds, in order to avoid getting scooped by a competing team, Seager says. Most outside experts agree that the researchers' models are strong. And Neptune was originally detected in a similar fashion — by researching observed anomalies in the movement of Uranus. Additionally, the idea of a large planet at such a distance from the Sun isn't actually that unlikely, according to Bruce Macintosh, a planetary scientist at Stanford University."
Wall, Mike (2016年2月4日). “'Planet Nine'? Cosmic Objects' Strange Orbits May Have a Different Explanation”. Space.com. 2016年2月8日時点のオリジナルよりアーカイブ。2016年2月8日閲覧。 “"We need more mass in the outer solar system," she (Madigan) said. "So it can either come from having more minor planets, and their self-gravity will do this to themselves naturally, or it could be in the form of one single massive planet — a Planet Nine. So it's a really exciting time, and we're going to discover one or the other."”
Totten, Sanden (2016年1月23日). “Planet 9: What should its name be if it's found?”. Science & Environment. Southern Californa Public Radio on 89.3 KPCC. 2016年6月14日閲覧。 ““We like to be consistent,” said Rosaly Lopes, a senior research scientist at NASA’s Jet Propulsion Laboratory and a member of the IAU’s Working Group for Planetary System Nomenclature. For a planet in our solar system, being consistent means sticking to the theme of giving them names from Greek and Roman mythology.（訳：NASA のジェット推進研究所に所属するシニア研究員であり IAU の天体命名作業部会に参加する Rosaly Lopes は「我々としては一貫性を保ちたい」と述べた。太陽系の惑星に関して言えば、一貫性を保つとは、つまりギリシャとローマの神話に因んだ名前をつけるという意味になる。）”
Wolchover, Natalie (2012年5月25日). “Planet X? New Evidence of an Unseen Planet at Solar System's Edge”. LiveScience. Purch. 2016年10月26日閲覧。 “More work is needed to determine whether Sedna and the other scattered disc objects were sent on their circuitous trips round the sun by a star that passed by long ago, or by an unseen planet that exists in the solar system right now. Finding and observing the orbits of other distant objects similar to Sedna will add more data points to astronomers' computer models.”
