Planet X
Planet X adalah planet hipotetikal besar setelah Neptunus. Basis ilmu pengetahuan hipotesis planet X pertama kali disebut tahun 1980-an, dan kini tidak ada porsi signifikan populasi ilmuwan yang percaya planet ini ada. Walaupun Pluto ditemukan sebagai akibat pencarian Planet X, planet ini tidak dianggap sebagai Planet X. Eris juga tidak dianggap.
Pranala luar
- SEDS on Planet X
- Planet X: No Dynamical Evidence in the Optical Observations - 1993 paper by E. Myles Standish, Jr. of the Jet Propulsion Laboratory, on the absence of orbital perturbation, when corrected planetary mass is used
- Information on Planet X, Research done by Jay Martell
- Official NASA website -- NASA's research on Planet X Diarsipkan 2008-03-19 di Wayback Machine.
Catatan kaki
- Ken Croswell: Planet Quest: The Epic Discovery of Alien Solar Systems, London, The Free Press, 1997 pp. 56–71
- P. K. Seidelmann, R. S. Harrington (1987). "Planet X - The current status". Journa Celestial Mechanics and Dynamical Astronomy. 43 (1–4): 55–68. doi:10.1007/BF01234554.
- D. P. Whitmire, J. J. Matese (1985). "Periodic comet showers and planet X". Nature. 313: 36–38. doi:10.1038/313036a0.
- G. D. Quinlan (1985). "Planet X: a myth exposed". Nature. 363: 18–19. doi:10.1038/363018b0.
- xfacts.com
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