Planets beyond Neptune (English Wikipedia)

Davies, John K.; McFarland, John; Bailey, Mark E.; Marsden, Brian G.; et al. (2008). "The Early Development of Ideas Concerning the Transneptunian Region" (PDF). In Baracci, M. Antonietta; Boenhardt, Hermann; Cruikchank, Dale; Morbidelli, Alissandro (eds.). The Solar System Beyond Neptune. University of Arizona Press. pp. 11–23. Archived from the original (PDF) on 2015-02-20. Retrieved 2014-11-05.

arxiv.org (Global: 69^th place; English: 59^th place)

Batygin, Konstantin; Brown, Michael E. (20 January 2016). "Evidence for a distant giant planet in the Solar system". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
Millholland, Sarah; Laughlin, Gregory (2017). "Constraints on Planet Nine's Orbit and Sky Position within a Framework of Mean Motion Resonances". The Astronomical Journal. 153 (3): 91. arXiv:1612.07774. Bibcode:2017AJ....153...91M. doi:10.3847/1538-3881/153/3/91. S2CID 119325788.
Buie, Marc W.; Grundy, William M.; Young, Eliot F.; Young, Leslie A. & Stern, S. Alan (July 2006). "Orbits and Photometry of Pluto's Satellites: Charon, S/2005 P1, and S/2005 P2". The Astronomical Journal. 132 (1): 290–298. arXiv:astro-ph/0512491. Bibcode:2006AJ....132..290B. doi:10.1086/504422. ISSN 0004-6256. S2CID 119386667.
Horner, J. & Evans, N. W. (September 2002). "Biases in cometary catalogues and Planet X". Monthly Notices of the Royal Astronomical Society. 335 (3): 641–654. arXiv:astro-ph/0205150. Bibcode:2002MNRAS.335..641H. doi:10.1046/j.1365-8711.2002.05649.x. S2CID 17110153.
Brown, Michael E.; Trujillo, Chadwick; Rabinowitz, David (2004). "Discovery of a Candidate Inner Oort Cloud Planetoid". The Astrophysical Journal. 617 (1): 645–649. arXiv:astro-ph/0404456. Bibcode:2004ApJ...617..645B. doi:10.1086/422095. ISSN 0004-637X. S2CID 7738201.
Patryk S., Lykawka; Tadashi, Mukai (2008). "An Outer Planet Beyond Pluto and the Origin of the Trans-Neptunian Belt Architecture". The Astronomical Journal. 135 (4): 1161–1200. arXiv:0712.2198. Bibcode:2008AJ....135.1161L. doi:10.1088/0004-6256/135/4/1161. S2CID 118414447.
Batygin, Konstantin; Adams, Fred C.; Brown, Michael E.; Becker, Juliette C. (2019). "The Planet Nine Hypothesis". Physics Reports. 805: 1–53. arXiv:1902.10103. Bibcode:2019PhR...805....1B. doi:10.1016/j.physrep.2019.01.009. S2CID 119248548.
Batygin, Konstantin; Brown, Michael E. (2016). "Evidence for a Distant Giant Planet in the Solar System". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59 – L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084. S2CID 118622180.
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 Letters. 460 (1): L64 – L68. arXiv:1604.05881. Bibcode:2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077. S2CID 119110892.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (11 October 2017). "Evidence for a possible bimodal distribution of the nodal distances of the extreme trans-Neptunian objects: avoiding a trans-Plutonian planet or just plain bias?". Monthly Notices of the Royal Astronomical Society Letters. 471 (1): L61 – L65. arXiv:1706.06981. Bibcode:2017MNRAS.471L..61D. doi:10.1093/mnrasl/slx106. S2CID 55469849.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (18 February 2021). "Memories of past close encounters in extreme trans-Neptunian space: Finding unseen planets using pure random searches". Astronomy and Astrophysics Letters. 646: L14 (9 pp). arXiv:2102.02220. Bibcode:2021A&A...646L..14D. doi:10.1051/0004-6361/202140311. S2CID 231802033.
Lykawka, Patryk Sofia; Ito, Takashi (August 2023). "Is There an Earth-like Planet in the Distant Kuiper Belt?". The Astronomical Journal. 166 (3): 118. arXiv:2308.13765. Bibcode:2023AJ....166..118L. doi:10.3847/1538-3881/aceaf0. ISSN 1538-3881.
Volk, Kathryn; Malhotra, Renu (2017). "The curiously warped mean plane of the Kuiper belt". The Astronomical Journal. 154 (2): 62. arXiv:1704.02444. Bibcode:2017AJ....154...62V. doi:10.3847/1538-3881/aa79ff. S2CID 5756310.
Iorio, Lorenzo (2017). "Is the recently proposed Mars-sized perturber at 65–80 AU ruled out by the Cassini ranging data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
de La Fuente Marcos, C.; de La Fuente Marcos, R. (October 2023). "Past the outer rim, into the unknown: structures beyond the Kuiper Cliff". Monthly Notices of the Royal Astronomical Society: Letters. 527 (1): L110 – L114. arXiv:2309.03885. Bibcode:2024MNRAS.527L.110D. doi:10.1093/mnrasl/slad132. ISSN 1745-3925.
Siraj, Amir; Chyba, Christopher F; Tremaine, Scott (12 August 2025). "Measuring the mean plane of the distant Kuiper belt". Monthly Notices of the Royal Astronomical Society: Letters. 543 (1): L27 – L33. arXiv:2508.14156. doi:10.1093/mnrasl/slaf091.
Siraj, Amir (2023-12-13), "Are There Terrestrial Planets Lurking in the Outer Solar System?", The Astrophysical Journal, 959 (2): L17, arXiv:2312.08431, Bibcode:2023ApJ...959L..17S, doi:10.3847/2041-8213/ad13eb
Matese, John J.; Whitmire, Daniel P. (2011). "Persistent evidence of a jovian mass solar companion in the Oort cloud". Icarus. 211 (2): 926–938. arXiv:1004.4584. Bibcode:2011Icar..211..926M. doi:10.1016/j.icarus.2010.11.009. S2CID 44204219.
Vlemmings, Wouter; Ramstedt, S.; Maercker, M.; Davidsson, B. (8 December 2015). "The serendipitous discovery of a possible new solar system object with ALMA". arXiv:1512.02650 [astro-ph.SR].
Iorio, L. (2014). "Planet X revamped after the discovery of the Sedna-like object 2012 VP113?". Monthly Notices of the Royal Astronomical Society: Letters. 444 (1): L78 – L79. arXiv:1404.0258. Bibcode:2014MNRAS.444L..78I. doi:10.1093/mnrasl/slu116. ISSN 1745-3933. S2CID 118554088.
Iorio, Lorenzo (2017). "Is the Recently Proposed Mars-Sized Perturber at 65–80 AU Ruled Out by the Cassini Ranging Data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
Fienga, A; Laskar, J; Manche, H; Gastineau, M (23 February 2016). "Constraints on the location of a possible 9th planet derived from the Cassini data". Astronomy and Astrophysics. 587: L8. arXiv:1602.06116. Bibcode:2016A&A...587L...8F. doi:10.1051/0004-6361/201628227. S2CID 119116589.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 May 2022). "Twisted extreme trans-Neptunian orbital parameter space: statistically significant asymmetries confirmed". Monthly Notices of the Royal Astronomical Society Letters. 512 (1): L6 – L10. arXiv:2202.01693. Bibcode:2022MNRAS.512L...6D. doi:10.1093/mnrasl/slac012.
Napier, J. K.; et al. (2021). "No Evidence for Orbital Clustering in the Extreme Trans-Neptunian Objects". The Planetary Science Journal. 2 (2): 59. arXiv:2102.05601. Bibcode:2021PSJ.....2...59N. doi:10.3847/PSJ/abe53e. S2CID 231861808.

astronomy.com (Global: low place; English: 8,690^th place)

Schindler, Kevin (2015-05-14). "Percival Lowell's three early searches for Planet X". Astronomy Magazine. Retrieved 2024-09-11.

bbc.co.uk (Global: 8^th place; English: 10^th place)

news.bbc.co.uk

"Astronomers discover 'new planet'". BBC News. 2004-03-15. Retrieved 2008-06-20.
"BBC News | SCI/TECH | A planet beyond Pluto". news.bbc.co.uk. Retrieved 2024-12-16.

bibliotecapleyades.net (Global: low place; English: low place)

Hasegawa, Kyoko (28 February 2008). "Japanese scientists eye mysterious 'Planet X'". BibliotecaPleyades.net. Retrieved 18 July 2016.

books.google.com (Global: 3^rd place; English: 3^rd place)

Meyersohn, Ryanne Maxine (2023-05-28). Figueroa Nieves, Rosa Amelia (ed.). Estudio Comprensivo del Origen de la Humanidad [Comprehensive Study of the Origin of Humanity]. (n.p.). Retrieved 2024-10-19.
Weintraub, David A. (2014). Is Pluto a Planet?: A Historical Journey through the Solar System. Princeton University Press. p. 141. ISBN 978-1-4008-5297-0.

caltech.edu (Global: 887^th place; English: 714^th place)

authors.library.caltech.edu

Houck JR, Schneider DP, Danielson GE, et al. (March 1985). "Unidentified IRAS sources - Ultrahigh-luminosity galaxies" (PDF). The Astrophysical Journal. 290: L5. Bibcode:1985ApJ...290L...5H. doi:10.1086/184431. ISSN 0004-637X.

astro.caltech.edu

Schwamb, Megan (2007-09-18). "Searching for Sedna's Sisters: Exploring the inner Oort cloud" (PDF). Caltech. Archived from the original (PDF) on 2013-05-12. Retrieved 2010-08-06.

ciw.edu (Global: low place; English: low place)

home.dtm.ciw.edu

Trujillo, C. A.; Sheppard, S. S. (2014). "A Sedna-like body with a perihelion of 80 astronomical units" (PDF). Nature. 507 (7493): 471–474. Bibcode:2014Natur.507..471T. doi:10.1038/nature13156. PMID 24670765. S2CID 4393431. Archived from the original (PDF) on 2014-12-16. Retrieved 2016-01-25.

cnn.com (Global: 28^th place; English: 26^th place)

edition.cnn.com

"NASA wants you to help find a new planet". CNN. 16 February 2017. Retrieved 11 March 2018.

dailyvoice.com (Global: 6,449^th place; English: 3,547^th place)

norwalk.dailyvoice.com

Helhoski, Anna. "News 02/16/11 Does the Solar System Have Giant New Planet?". The Norwalk Daily Voice. Retrieved 10 July 2012.

doi.org (Global: 2^nd place; English: 2^nd place)

Bower, Ernest Clare (1931). "On the orbit and mass of Pluto with an ephemeris for 1931-1932". Lick Observatory Bulletins. 15 (437): 171–178. Bibcode:1931LicOB..15..171B. doi:10.5479/ADS/bib/1931LicOB.15.171B. ISSN 0075-9317.
Tegler, S. C. & Romanishin, W. (May 2001). "Almost Planet X". Nature. 411 (6836): 423–424. Bibcode:2001Natur.411..423T. doi:10.1038/35078164. ISSN 0028-0836. PMID 11373654. S2CID 5135498.
Luhman, K. L. (2014). "A Search for a Distant Companion to the Sun with the Wide-field Infrared Survey Explorer". The Astrophysical Journal. 781 (1): 4. Bibcode:2014ApJ...781....4L. doi:10.1088/0004-637X/781/1/4. S2CID 122930471.
Trujillo, C. A.; Sheppard, S. S. (2014). "A Sedna-like body with a perihelion of 80 astronomical units" (PDF). Nature. 507 (7493): 471–474. Bibcode:2014Natur.507..471T. doi:10.1038/nature13156. PMID 24670765. S2CID 4393431. Archived from the original (PDF) on 2014-12-16. Retrieved 2016-01-25.
Batygin, Konstantin; Brown, Michael E. (20 January 2016). "Evidence for a distant giant planet in the Solar system". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
Grosser, Morton (June 1964). "The Search for a Planet beyond Neptune". Isis. 55 (2): 163–183. doi:10.1086/349825. ISSN 0021-1753. JSTOR 228182. S2CID 144255699.
Millholland, Sarah; Laughlin, Gregory (2017). "Constraints on Planet Nine's Orbit and Sky Position within a Framework of Mean Motion Resonances". The Astronomical Journal. 153 (3): 91. arXiv:1612.07774. Bibcode:2017AJ....153...91M. doi:10.3847/1538-3881/153/3/91. S2CID 119325788.
Sherrill, Thomas J. (February 1999). "A Career of Controversy: The Anomaly of T.J.J. See". Journal for the History of Astronomy. 30 (1): 25–50. Bibcode:1999JHA....30...25S. doi:10.1177/002182869903000102. ISSN 0021-8286. S2CID 117727302.
Musotto, Susanna; Varadi, Ferenc; Moore, William; Schubert, Gerald (October 2002). "Numerical Simulations of the Orbits of the Galilean Satellites". Icarus. 159 (2): 500–504. Bibcode:2002Icar..159..500M. doi:10.1006/icar.2002.6939.
Hoyt, William Graves (December 1976). "W. H. Pickering's Planetary Predictions and the Discovery of Pluto". Isis. 67 (4): 551–564. doi:10.1086/351668. ISSN 0021-1753. JSTOR 230561. PMID 794024. S2CID 26512655. p. 563.
Brown, Ernest W. (November 1931). "On a Criterion for the Prediction of an Unknown Planet". Monthly Notices of the Royal Astronomical Society. 92 (1): 80–100. Bibcode:1931MNRAS..92...80B. doi:10.1093/mnras/92.1.80. ISSN 0035-8711.
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Kuiper, Gerard P. (August 1950). "The Diameter of Pluto". Publications of the Astronomical Society of the Pacific. 62 (366): 133–137. Bibcode:1950PASP...62..133K. doi:10.1086/126255.
Baade, W. (1934). "The Photographic Magnitude and Color Index of Pluto". Publications of the Astronomical Society of the Pacific. 46 (272): 218. Bibcode:1934PASP...46..218B. doi:10.1086/124467. ISSN 0004-6280.
Rawlins, D.; Hammerton, M. (June 1973). "Mass and Position Limits for an Hypothetical Tenth Planet of the Solar System". Monthly Notices of the Royal Astronomical Society. 162 (3): 261–270. Bibcode:1973MNRAS.162..261R. doi:10.1093/mnras/162.3.261. ISSN 0035-8711. Rawlins also took into account Pluto's stellar occultation failure as reported by Halliday, Ian; Hardie, R. H.; Franz, Otto G.; Priser, John B. (1966). "An Upper Limit for the Diameter of Pluto". Publications of the Astronomical Society of the Pacific. 78 (461): 113. Bibcode:1966PASP...78..113H. doi:10.1086/128307. ISSN 0004-6280. S2CID 121483531.
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Christy, J. W. & Harrington, R. S. (August 1978). "The satellite of Pluto". The Astronomical Journal. 83 (8): 1005. Bibcode:1978AJ.....83.1005C. doi:10.1086/112284.
Buie, Marc W.; Grundy, William M.; Young, Eliot F.; Young, Leslie A. & Stern, S. Alan (July 2006). "Orbits and Photometry of Pluto's Satellites: Charon, S/2005 P1, and S/2005 P2". The Astronomical Journal. 132 (1): 290–298. arXiv:astro-ph/0512491. Bibcode:2006AJ....132..290B. doi:10.1086/504422. ISSN 0004-6256. S2CID 119386667.
Harrington, R. S. (October 1988). "The location of Planet X". The Astronomical Journal. 96: 1476. Bibcode:1988AJ.....96.1476H. doi:10.1086/114898.
Brady, Joseph L. (1972). "The Effect of a Trans-Plutonian Planet on Halley's Comet". Publications of the Astronomical Society of the Pacific. 84 (498): 314–322. Bibcode:1972PASP...84..314B. doi:10.1086/129290. S2CID 122053270.
Houck JR, Schneider DP, Danielson GE, et al. (March 1985). "Unidentified IRAS sources - Ultrahigh-luminosity galaxies" (PDF). The Astrophysical Journal. 290: L5. Bibcode:1985ApJ...290L...5H. doi:10.1086/184431. ISSN 0004-637X.
Jackson, A. A. & Killen, R. M. (October 1988). "Planet X and the stability of resonances in the Neptune-Pluto system". Monthly Notices of the Royal Astronomical Society. 235 (2): 593–601. Bibcode:1988MNRAS.235..593J. doi:10.1093/mnras/235.2.593. ISSN 0035-8711.
Standish, E. M. (May 1993). "Planet X - No dynamical evidence in the optical observations". The Astronomical Journal. 105 (5): 2000. Bibcode:1993AJ....105.2000S. doi:10.1086/116575.
Horner, J. & Evans, N. W. (September 2002). "Biases in cometary catalogues and Planet X". Monthly Notices of the Royal Astronomical Society. 335 (3): 641–654. arXiv:astro-ph/0205150. Bibcode:2002MNRAS.335..641H. doi:10.1046/j.1365-8711.2002.05649.x. S2CID 17110153.
Brown, Michael E.; Trujillo, Chadwick; Rabinowitz, David (2004). "Discovery of a Candidate Inner Oort Cloud Planetoid". The Astrophysical Journal. 617 (1): 645–649. arXiv:astro-ph/0404456. Bibcode:2004ApJ...617..645B. doi:10.1086/422095. ISSN 0004-637X. S2CID 7738201.
Patryk S., Lykawka; Tadashi, Mukai (2008). "An Outer Planet Beyond Pluto and the Origin of the Trans-Neptunian Belt Architecture". The Astronomical Journal. 135 (4): 1161–1200. arXiv:0712.2198. Bibcode:2008AJ....135.1161L. doi:10.1088/0004-6256/135/4/1161. S2CID 118414447.
Batygin, Konstantin; Adams, Fred C.; Brown, Michael E.; Becker, Juliette C. (2019). "The Planet Nine Hypothesis". Physics Reports. 805: 1–53. arXiv:1902.10103. Bibcode:2019PhR...805....1B. doi:10.1016/j.physrep.2019.01.009. S2CID 119248548.
Batygin, Konstantin; Brown, Michael E. (2016). "Evidence for a Distant Giant Planet in the Solar System". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59 – L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084. S2CID 118622180.
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 Letters. 460 (1): L64 – L68. arXiv:1604.05881. Bibcode:2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077. S2CID 119110892.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (11 October 2017). "Evidence for a possible bimodal distribution of the nodal distances of the extreme trans-Neptunian objects: avoiding a trans-Plutonian planet or just plain bias?". Monthly Notices of the Royal Astronomical Society Letters. 471 (1): L61 – L65. arXiv:1706.06981. Bibcode:2017MNRAS.471L..61D. doi:10.1093/mnrasl/slx106. S2CID 55469849.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (18 February 2021). "Memories of past close encounters in extreme trans-Neptunian space: Finding unseen planets using pure random searches". Astronomy and Astrophysics Letters. 646: L14 (9 pp). arXiv:2102.02220. Bibcode:2021A&A...646L..14D. doi:10.1051/0004-6361/202140311. S2CID 231802033.
Brunini, A & M.D. Melita (November 2002). "The Existence of a Planet beyond 50 AU and the Orbital Distribution of the Classical Edgeworth–Kuiper-Belt Objects". Icarus. 160 (1): 32–43. Bibcode:2002Icar..160...32B. doi:10.1006/icar.2002.6935. hdl:11336/37037.
Lykawka, Patryk Sofia; Ito, Takashi (August 2023). "Is There an Earth-like Planet in the Distant Kuiper Belt?". The Astronomical Journal. 166 (3): 118. arXiv:2308.13765. Bibcode:2023AJ....166..118L. doi:10.3847/1538-3881/aceaf0. ISSN 1538-3881.
Volk, Kathryn; Malhotra, Renu (2017). "The curiously warped mean plane of the Kuiper belt". The Astronomical Journal. 154 (2): 62. arXiv:1704.02444. Bibcode:2017AJ....154...62V. doi:10.3847/1538-3881/aa79ff. S2CID 5756310.
Iorio, Lorenzo (2017). "Is the recently proposed Mars-sized perturber at 65–80 AU ruled out by the Cassini ranging data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
de La Fuente Marcos, C.; de La Fuente Marcos, R. (October 2023). "Past the outer rim, into the unknown: structures beyond the Kuiper Cliff". Monthly Notices of the Royal Astronomical Society: Letters. 527 (1): L110 – L114. arXiv:2309.03885. Bibcode:2024MNRAS.527L.110D. doi:10.1093/mnrasl/slad132. ISSN 1745-3925.
Siraj, Amir; Chyba, Christopher F; Tremaine, Scott (12 August 2025). "Measuring the mean plane of the distant Kuiper belt". Monthly Notices of the Royal Astronomical Society: Letters. 543 (1): L27 – L33. arXiv:2508.14156. doi:10.1093/mnrasl/slaf091.
Siraj, Amir (2023-12-13), "Are There Terrestrial Planets Lurking in the Outer Solar System?", The Astrophysical Journal, 959 (2): L17, arXiv:2312.08431, Bibcode:2023ApJ...959L..17S, doi:10.3847/2041-8213/ad13eb
Matese, John J.; Whitmire, Daniel P. (2011). "Persistent evidence of a jovian mass solar companion in the Oort cloud". Icarus. 211 (2): 926–938. arXiv:1004.4584. Bibcode:2011Icar..211..926M. doi:10.1016/j.icarus.2010.11.009. S2CID 44204219.
Iorio, L. (2014). "Planet X revamped after the discovery of the Sedna-like object 2012 VP113?". Monthly Notices of the Royal Astronomical Society: Letters. 444 (1): L78 – L79. arXiv:1404.0258. Bibcode:2014MNRAS.444L..78I. doi:10.1093/mnrasl/slu116. ISSN 1745-3933. S2CID 118554088.
Iorio, Lorenzo (2017). "Is the Recently Proposed Mars-Sized Perturber at 65–80 AU Ruled Out by the Cassini Ranging Data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
Fienga, A; Laskar, J; Manche, H; Gastineau, M (23 February 2016). "Constraints on the location of a possible 9th planet derived from the Cassini data". Astronomy and Astrophysics. 587: L8. arXiv:1602.06116. Bibcode:2016A&A...587L...8F. doi:10.1051/0004-6361/201628227. S2CID 119116589.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 May 2022). "Twisted extreme trans-Neptunian orbital parameter space: statistically significant asymmetries confirmed". Monthly Notices of the Royal Astronomical Society Letters. 512 (1): L6 – L10. arXiv:2202.01693. Bibcode:2022MNRAS.512L...6D. doi:10.1093/mnrasl/slac012.
Napier, J. K.; et al. (2021). "No Evidence for Orbital Clustering in the Extreme Trans-Neptunian Objects". The Planetary Science Journal. 2 (2): 59. arXiv:2102.05601. Bibcode:2021PSJ.....2...59N. doi:10.3847/PSJ/abe53e. S2CID 231861808.

elsevier.com (Global: 610^th place; English: 704^th place)

linkinghub.elsevier.com

Brunini, A & M.D. Melita (November 2002). "The Existence of a Planet beyond 50 AU and the Orbital Distribution of the Classical Edgeworth–Kuiper-Belt Objects". Icarus. 160 (1): 32–43. Bibcode:2002Icar..160...32B. doi:10.1006/icar.2002.6935. hdl:11336/37037.

ernet.in (Global: 4,058^th place; English: 2,544^th place)

new.dli.ernet.in

Chhabra, J. G.; Sharma, S. D.; Khanna, Manju (1984). "Prediction of Pluto by V. P. Ketakar" (PDF). Indian Journal of History of Science. 19 (1): 18–26. Bibcode:1984InJHS..19...18C. Archived from the original (PDF) on 2009-02-25. Retrieved 2008-09-04.

ghostarchive.org (Global: 32^nd place; English: 21^st place)

Brown, Mike (August 2008). Pluto, Eris, and the dwarf planets of the outer solar system (academic talk). Smithsonian. Event occurs at 50ᵐ. Archived from the original on 2021-11-14. Retrieved 2 January 2019 – via YouTube. The argument about dwarf planet sizes beyond Neptune is 50ᵐ into his talk. The WGBH link doesn't work; view on YouTube.

handle.net (Global: 102^nd place; English: 76^th place)

hdl.handle.net

Brunini, A & M.D. Melita (November 2002). "The Existence of a Planet beyond 50 AU and the Orbital Distribution of the Classical Edgeworth–Kuiper-Belt Objects". Icarus. 160 (1): 32–43. Bibcode:2002Icar..160...32B. doi:10.1006/icar.2002.6935. hdl:11336/37037.

harvard.edu (Global: 18^th place; English: 17^th place)

ui.adsabs.harvard.edu

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Brown, Michael E.; Trujillo, Chadwick; Rabinowitz, David (2004). "Discovery of a Candidate Inner Oort Cloud Planetoid". The Astrophysical Journal. 617 (1): 645–649. arXiv:astro-ph/0404456. Bibcode:2004ApJ...617..645B. doi:10.1086/422095. ISSN 0004-637X. S2CID 7738201.
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de la Fuente Marcos, C.; de la Fuente Marcos, R. (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59 – L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084. S2CID 118622180.
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 Letters. 460 (1): L64 – L68. arXiv:1604.05881. Bibcode:2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077. S2CID 119110892.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (11 October 2017). "Evidence for a possible bimodal distribution of the nodal distances of the extreme trans-Neptunian objects: avoiding a trans-Plutonian planet or just plain bias?". Monthly Notices of the Royal Astronomical Society Letters. 471 (1): L61 – L65. arXiv:1706.06981. Bibcode:2017MNRAS.471L..61D. doi:10.1093/mnrasl/slx106. S2CID 55469849.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (18 February 2021). "Memories of past close encounters in extreme trans-Neptunian space: Finding unseen planets using pure random searches". Astronomy and Astrophysics Letters. 646: L14 (9 pp). arXiv:2102.02220. Bibcode:2021A&A...646L..14D. doi:10.1051/0004-6361/202140311. S2CID 231802033.
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Volk, Kathryn; Malhotra, Renu (2017). "The curiously warped mean plane of the Kuiper belt". The Astronomical Journal. 154 (2): 62. arXiv:1704.02444. Bibcode:2017AJ....154...62V. doi:10.3847/1538-3881/aa79ff. S2CID 5756310.
Iorio, Lorenzo (2017). "Is the recently proposed Mars-sized perturber at 65–80 AU ruled out by the Cassini ranging data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
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Iorio, L. (2014). "Planet X revamped after the discovery of the Sedna-like object 2012 VP113?". Monthly Notices of the Royal Astronomical Society: Letters. 444 (1): L78 – L79. arXiv:1404.0258. Bibcode:2014MNRAS.444L..78I. doi:10.1093/mnrasl/slu116. ISSN 1745-3933. S2CID 118554088.
Iorio, Lorenzo (2017). "Is the Recently Proposed Mars-Sized Perturber at 65–80 AU Ruled Out by the Cassini Ranging Data?". Frontiers in Astronomy and Space Sciences. 4 28. arXiv:1407.5894. Bibcode:2017FrASS...4...28I. doi:10.3389/fspas.2017.00028. S2CID 26844167.
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de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 May 2022). "Twisted extreme trans-Neptunian orbital parameter space: statistically significant asymmetries confirmed". Monthly Notices of the Royal Astronomical Society Letters. 512 (1): L6 – L10. arXiv:2202.01693. Bibcode:2022MNRAS.512L...6D. doi:10.1093/mnrasl/slac012.
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academic.oup.com

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phys.org (Global: 1,283^rd place; English: 1,130^th place)

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science.org (Global: 1,160^th place; English: 737^th place)

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Starr, Michelle (2024-01-10). "There Could Be Alien, Mars-Sized Planets Lurking Beyond Pluto". ScienceAlert. Retrieved 2025-06-07.

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semanticscholar.org (Global: 11^th place; English: 8^th place)

api.semanticscholar.org

Tegler, S. C. & Romanishin, W. (May 2001). "Almost Planet X". Nature. 411 (6836): 423–424. Bibcode:2001Natur.411..423T. doi:10.1038/35078164. ISSN 0028-0836. PMID 11373654. S2CID 5135498.
Luhman, K. L. (2014). "A Search for a Distant Companion to the Sun with the Wide-field Infrared Survey Explorer". The Astrophysical Journal. 781 (1): 4. Bibcode:2014ApJ...781....4L. doi:10.1088/0004-637X/781/1/4. S2CID 122930471.
Trujillo, C. A.; Sheppard, S. S. (2014). "A Sedna-like body with a perihelion of 80 astronomical units" (PDF). Nature. 507 (7493): 471–474. Bibcode:2014Natur.507..471T. doi:10.1038/nature13156. PMID 24670765. S2CID 4393431. Archived from the original (PDF) on 2014-12-16. Retrieved 2016-01-25.
Batygin, Konstantin; Brown, Michael E. (20 January 2016). "Evidence for a distant giant planet in the Solar system". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
Grosser, Morton (June 1964). "The Search for a Planet beyond Neptune". Isis. 55 (2): 163–183. doi:10.1086/349825. ISSN 0021-1753. JSTOR 228182. S2CID 144255699.
Millholland, Sarah; Laughlin, Gregory (2017). "Constraints on Planet Nine's Orbit and Sky Position within a Framework of Mean Motion Resonances". The Astronomical Journal. 153 (3): 91. arXiv:1612.07774. Bibcode:2017AJ....153...91M. doi:10.3847/1538-3881/153/3/91. S2CID 119325788.
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Hoyt, William Graves (December 1976). "W. H. Pickering's Planetary Predictions and the Discovery of Pluto". Isis. 67 (4): 551–564. doi:10.1086/351668. ISSN 0021-1753. JSTOR 230561. PMID 794024. S2CID 26512655. p. 563.
Rawlins, D.; Hammerton, M. (June 1973). "Mass and Position Limits for an Hypothetical Tenth Planet of the Solar System". Monthly Notices of the Royal Astronomical Society. 162 (3): 261–270. Bibcode:1973MNRAS.162..261R. doi:10.1093/mnras/162.3.261. ISSN 0035-8711. Rawlins also took into account Pluto's stellar occultation failure as reported by Halliday, Ian; Hardie, R. H.; Franz, Otto G.; Priser, John B. (1966). "An Upper Limit for the Diameter of Pluto". Publications of the Astronomical Society of the Pacific. 78 (461): 113. Bibcode:1966PASP...78..113H. doi:10.1086/128307. ISSN 0004-6280. S2CID 121483531.
Buie, Marc W.; Grundy, William M.; Young, Eliot F.; Young, Leslie A. & Stern, S. Alan (July 2006). "Orbits and Photometry of Pluto's Satellites: Charon, S/2005 P1, and S/2005 P2". The Astronomical Journal. 132 (1): 290–298. arXiv:astro-ph/0512491. Bibcode:2006AJ....132..290B. doi:10.1086/504422. ISSN 0004-6256. S2CID 119386667.
Brady, Joseph L. (1972). "The Effect of a Trans-Plutonian Planet on Halley's Comet". Publications of the Astronomical Society of the Pacific. 84 (498): 314–322. Bibcode:1972PASP...84..314B. doi:10.1086/129290. S2CID 122053270.
Horner, J. & Evans, N. W. (September 2002). "Biases in cometary catalogues and Planet X". Monthly Notices of the Royal Astronomical Society. 335 (3): 641–654. arXiv:astro-ph/0205150. Bibcode:2002MNRAS.335..641H. doi:10.1046/j.1365-8711.2002.05649.x. S2CID 17110153.
Brown, Michael E.; Trujillo, Chadwick; Rabinowitz, David (2004). "Discovery of a Candidate Inner Oort Cloud Planetoid". The Astrophysical Journal. 617 (1): 645–649. arXiv:astro-ph/0404456. Bibcode:2004ApJ...617..645B. doi:10.1086/422095. ISSN 0004-637X. S2CID 7738201.
Patryk S., Lykawka; Tadashi, Mukai (2008). "An Outer Planet Beyond Pluto and the Origin of the Trans-Neptunian Belt Architecture". The Astronomical Journal. 135 (4): 1161–1200. arXiv:0712.2198. Bibcode:2008AJ....135.1161L. doi:10.1088/0004-6256/135/4/1161. S2CID 118414447.
Batygin, Konstantin; Adams, Fred C.; Brown, Michael E.; Becker, Juliette C. (2019). "The Planet Nine Hypothesis". Physics Reports. 805: 1–53. arXiv:1902.10103. Bibcode:2019PhR...805....1B. doi:10.1016/j.physrep.2019.01.009. S2CID 119248548.
Batygin, Konstantin; Brown, Michael E. (2016). "Evidence for a Distant Giant Planet in the Solar System". The Astronomical Journal. 151 (2): 22. arXiv:1601.05438. Bibcode:2016AJ....151...22B. doi:10.3847/0004-6256/151/2/22. S2CID 2701020.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59 – L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084. S2CID 118622180.
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 Letters. 460 (1): L64 – L68. arXiv:1604.05881. Bibcode:2016MNRAS.460L..64D. doi:10.1093/mnrasl/slw077. S2CID 119110892.
de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (11 October 2017). "Evidence for a possible bimodal distribution of the nodal distances of the extreme trans-Neptunian objects: avoiding a trans-Plutonian planet or just plain bias?". Monthly Notices of the Royal Astronomical Society Letters. 471 (1): L61 – L65. arXiv:1706.06981. Bibcode:2017MNRAS.471L..61D. doi:10.1093/mnrasl/slx106. S2CID 55469849.
de la Fuente Marcos, C.; de la Fuente Marcos, R. (18 February 2021). "Memories of past close encounters in extreme trans-Neptunian space: Finding unseen planets using pure random searches". Astronomy and Astrophysics Letters. 646: L14 (9 pp). arXiv:2102.02220. Bibcode:2021A&A...646L..14D. doi:10.1051/0004-6361/202140311. S2CID 231802033.
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Planets beyond Neptune (English Wikipedia)

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