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Helhoski, Anna. "News 02/16/11 Does the Solar System Have Giant New Planet?". The Norwalk Daily Voice . Retrieved 10 July 2012. 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. Almost any multivariable strategy game creates puzzles, but these puzzles, unlike those of explicit puzzle games, emerge from the complexity of the mechanics of the game itself”. 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.
Locate Planet X. If you think you know where Planet X is, you take this action, and input the sector into the app. To make sure that you really know what you’re talking about, the app also requires you to know what is in the sector to the left and right of Planet X as well. It costs 5 hours to take this action. If you are right, the end game is triggered. If you are wrong, the game continues. Either way, your opponents do not know in what sector you looked in. The app will ask which side of the board you’re facing and give you some starting information (with more experienced players being given less). The Laws Of Logic 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°
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If you’ve ever done any of those logic grid puzzles, you’ve got a good idea of what you’ll need to do in The Search for Planet X. It’s a process of elimination and using the scant information you’re given to lead to logical conclusions. It’s a really satisfying thing when it goes well, and the Eureka moments are fantastic. When you put two and two together and come up with four, well, that makes you feel like some kind of genius, and it’s great.
In January 2016, Konstantin Batygin and Michael E. Brown published their “Planet Nine” hypothesis. Using a computer model, they showed that a distant planet could explain the unique orbits of observable objects in the solar system. In The Search for Planet X, 1-4 players take on the role of astronomers, surveying the night sky and attempting to deduce the location of this hidden planet. L. Iorio (2014). "Planet X revamped after the discovery of the Sedna-like object 2012 VP113?". Monthly Notices of the Royal Astronomical Society: Letters. 444: L78–L79. arXiv: 1404.0258. Bibcode: 2014MNRAS.444L..78I. doi: 10.1093/mnrasl/slu116. S2CID 118554088. Well, first and foremost, I guess I want to talk about whether this is even a boardgame or not. By some definition, it is. The box looks like a boardgame, and there is a nice linen finish board that is put on the table between the players, and there are some nice chits that look like they belong to a game. But… the meat of the game is in the app. In fact, it’s impossible to play the game without the app. This has led some of the gamers that I have played with to think that this is really a phone game that happens to have a few physical pieces. To be honest, I am not overly caught up in the semantics of it – it’s a great logic puzzle that needs both sets of bits to work well, and in the end, I’ve enjoyed all my games of it, and that’s probably what matters in the end.Deduction is rigid, which makes it difficult to incorporate into board games, which thrive best in the rivers of uncertainty and doubt. If a deduction problem can be solved, it can be solved absolutely, at which point it simply becomes a matter of figuring out what the solution is. I love such puzzles but I also understand that they easily fail in the context of a board game. 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. Conference – in each of the two conferences, you will learn a logic rule about Planet X (which is valid for this particular game). All players will learn this at the same time and will learn the same information. Note that there are only two conferences per game. If you are still playing when you come across a third conference icon, you can ignore it. Comets (2) – Comets only appear in certain sectors (noted on your sheet). When surveying for them, you must start and end in one of these designated sectors.
The Search for Planet X was touted as the next great logic/deduction game. As the story goes: “At the edge of our solar system, a dark planet may lurk. In 2015, astronomers estimated a large distant planet could explain the unique orbits of dwarf planets and other objects. Since then, astronomers have been scanning the sky, hoping to find this planet. In The Search for Planet X, players take on the role of astronomers who use observations and logical deductions to search for this hypothetical planet. Each game, the companion app randomly selects an arrangement of objects and a location for Planet X following predefined logic rules.” Players should sit so that they are right in front of one of the symbols; this is important for game setup. It is also helpful to get the score sheet which matches your symbol. If you match, the board on your sheet will cleverly be in the same orientation as what you see on the table in front of you. This will make it easier for you to take notes in the appropriate spaces and to more clearly see things. In addition to the note sheet, each player gets a screen with which to hide their notes. They also get a set of 12 theory tokens and 2 target tokens. Thomas O'Toole (1983-12-30). "Mystery Heavenly Body Discovered". The Washington Post. p.A1. Archived from the original on 2008-02-01 . Retrieved 2008-01-28. a b c d e f g h i j k Morton Grosser (1964). "The Search For A Planet Beyond Neptune". Isis. 55 (2): 163–183. doi: 10.1086/349825. JSTOR 228182. S2CID 144255699. Chang, Kenneth (20 January 2016). "Ninth Planet May Exist Beyond Pluto, Scientists Report". The New York Times . Retrieved 22 January 2016.J. Horner & N. W. Evans (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. The hunt for hidden planets in the solar system has a long history, and is not without its success stories. Based on weird perturbations of Uranus' orbit, French astronomer Urbain LeVerrier discovered Neptune in 1846, bringing the number of known planets up to eight. And when Neptune also showed irregularities in its orbit that couldn't be explained, scientists began hunting for a ninth planet.
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