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Renegade Game Studios Renegade Game Studio | The Search for Planet X | Board Game | Ages 13+ | 1-4 Players | 60 Minutes Playing Time

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In essence, the game is an extended Logic Problem puzzle wrapped up into a board game. So, if logic is your thing, then you’re likely to get a lot out of Planet X. If not, it might leave you a little cold. Additionally, speculation of a possible trans-Neptunian planet has revolved around the so-called " Kuiper cliff". The Kuiper belt terminates suddenly at a distance of 48AU (7.2billionkm; 4.5billionmi) from the Sun. Brunini and Melita have speculated that this sudden drop-off may be attributed to the presence of an object with a mass between those of Mars and Earth located beyond 48AU. [81] 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. a b J. K. Davies; J. McFarland; M. E. Bailey; B. G. Marsden; etal. (2008). "The Early Development of Ideas Concerning the Transneptunian Region" (PDF). In M. Antonietta Baracci; Hermann Boenhardt; Dale Cruikchank; Alissandro Morbidelli (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. Dwarf Planets: There are 4 Dwarf Planets and they are found in a band of exactly six sectors, with a dwarf planet at both ends.

Ernest W. Brown (1931). "On a criterion for the prediction of an unknown planet". Monthly Notices of the Royal Astronomical Society. 92: 80–100. Bibcode: 1931MNRAS..92...80B. doi: 10.1093/mnras/92.1.80. Using modern data on the anomalous precession of the perihelia of Saturn, Earth, and Mars, Lorenzo Iorio concluded that any unknown planet with a mass of 0.7 times that of Earth must be farther than 350–400AU; one with a mass of 2 times that of Earth, farther than 496–570AU; and finally one with a mass of 15 times that of Earth, farther than 970–1,111AU. [100] Moreover, Iorio stated that the modern ephemerides of the Solar System outer planets has provided even tighter constraints: no celestial body with a mass of 15 times that of Earth can exist closer than 1,100–1,300AU. [101] However, work by another group of astronomers using a more comprehensive model of the Solar System found that Iorio's conclusion was only partially correct. Their analysis of Cassini data on Saturn's orbital residuals found that observations were inconsistent with a planetary body with the orbit and mass similar to those of Batygin and Brown's Planet Nine having a true anomaly of −130° to −110°, or −65° to 85°. Furthermore, the analysis found that Saturn's orbit is slightly better explained if such a body is located at a true anomaly of 117.8° +11° a b TJ Sherrill (1999). "A Career of Controversy: The Anomaly of T. J. J. See". Journal for the History of Astronomy. 30: 25–50. Bibcode: 1999JHA....30...25S. doi: 10.1177/002182869903000102. S2CID 117727302. First, decide whether you want to play in Standard Mode (12 sectors) or Expert Mode (18 sectors). Place the sun disc in the centre of the board and overlay the earth board so that the yellow arrow is pointing into sector 1. On January 20, 2016, Brown and Konstantin Batygin published an article corroborating Trujillo and Sheppard's initial findings; proposing a super-Earth (dubbed Planet Nine) based on a statistical clustering of the arguments of perihelia (noted before) near zero and also ascending nodes near 113° of six distant trans-Neptunian objects. They estimated it to be ten times the mass of Earth (about 60% the mass of Neptune) with a semimajor axis of approximately 400–1500 AU. [8] [75] [76] Probability [ edit ]a b 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. Both Brown and Sheppard noted that there are already surveys of the sky looking for these kinds of object, and anything more than about 130 miles across at the distance they are positing would have been seen by now, perhaps even by a high-end amateur telescope.

In 2014 astronomers at the Universidad Complutense in Madrid suggested that the available data actually indicates more than one trans-Neptunian planet; [71] subsequent work further suggests that the evidence is robust enough but rather than connected with Ω and ω, semi-major axes and nodal distances could be the signposts. [72] [73] Additional work based on improved orbits of 39 objects still indicates that more than one perturber could be present and that one of them could orbit the Sun at 300-400 AU. [74] a b James W. Christy & Robert S. Harrington (August 1978). "The Satellite of Pluto". Astronomical Journal. 83 (8): 1005–1008. Bibcode: 1978AJ.....83.1005C. doi: 10.1086/112284. Following the discovery of the planet Neptune in 1846, there was considerable speculation that another planet might exist beyond its orbit. The search began in the mid-19th century and continued at the start of the 20th with Percival Lowell's quest for Planet X. Lowell proposed the PlanetX hypothesis to explain apparent discrepancies in the orbits of the giant planets, particularly Uranus and Neptune, [1] speculating that the gravity of a large unseen ninth planet could have perturbed Uranus enough to account for the irregularities. [2]NASA's Solar System Exploration: Multimedia: Gallery: Pluto's Symbol". NASA. Archived from the original on 2006-10-01 . Retrieved 2007-03-25. Minor Planet Center (1992). "Circular No. 5611". Archived from the original on May 4, 2008 . Retrieved 2011-07-05.

In 2012, Rodney Gomes modelled the orbits of 92 Kuiper belt objects and found that six of those orbits were far more elongated than the model predicted. He concluded that the simplest explanation was the gravitational pull of a distant planetary companion, such as a Neptune-sized object at 1,500 AU. This Neptune-sized object would cause the perihelia of objects with semi-major axes greater than 300 AU to oscillate, delivering them into planet-crossing orbits like those of (308933) 2006 SQ 372 and (87269) 2000 OO 67 or detached orbits like Sedna's. [69] Planet Nine [ edit ] Prediction of hypothetical Planet Nine's orbit based on unique clustering Although some astronomers, such as Renu Malhotra and David Jewitt, have cautiously supported these claims, others, such as Alessandro Morbidelli, have dismissed them as "contrived". [63] Malhotra & Volk (2017) [83] argued that an unexpected variance in inclination for KBOs farther than the cliff at 50AU (7.5billionkm; 4.6billionmi) provided evidence of a possible Mars-sized planet, possibly up to 2.4 M Earth, residing at the edge of the Solar System, which many news sources began referring to as "PlanetTen". [84] [83] [85] [86] Shortly after it was proposed, Lorenzo Iorio showed that the hypothetical planet's existence cannot be ruled out by Cassini ranging data. [87] Chang, Kenneth (20 January 2016). "Ninth Planet May Exist Beyond Pluto, Scientists Report". The New York Times . Retrieved 22 January 2016. As I mentioned, there is a handicap system. You start the game by setting each player’s starting level and the app gives players a different number of clues according to the handicap. To help solve the puzzle you are told how many of each item there are in the solar system and have standard rules about the positioning of each item.


However, Brown notes that even though it might approach or exceed Earth in size, should such an object be found it would still be a "dwarf planet" by the current definition, because it would not have cleared its neighbourhood sufficiently. [78] Kuiper cliff and "Planet Ten" [ edit ] A. Brunini & M.D. Melita (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.

Survey for an object (? Time) – Decide which object you want to look for and choose a number of sectors in which to search (e.g., Asteroids in sectors 1-6). The app will tell you how many of those objects are in your selected area. We have played it 4 times now. I love it, I would say hubby likes it. (He most enjoyed the first game, when he won.) Using these rules, you will gradually be able to work out the pattern of the night sky and where each object is.


a b Dennis Rawlins (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. Rawlins also took into account Pluto's stellar occultation failure as reported by Halliday, I.; Hardie, R.; Franz, O.; Priser, J. (1966). "An upper limit for the diameter of Pluto". Publications of the Astronomical Society of the Pacific. 78 (461): 113–124. Bibcode: 1966PASP...78..113H. doi: 10.1086/128307. S2CID 121483531. During this phase, players will have a chance to submit theories as to where they think objects are located on the board. Each player can submit one theory in Standard Mode and up to two in Expert Mode.

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