PBS Discussions Discussion Forums on pbs.org    Search   Register   Profile   Ignore List   Log in  10th Planet    PBS Discussions Forum Index -> NOVA scienceNOW: Stories 2006 View previous topic :: View next topic   Author Message NOVA scienceNOW1 Moderator Joined: 13 Jan 2005 Posts: 64 Post subject: 10th Planet    Posted: Thu Dec 29, 2005 2:43 pm A new discovery is causing a stir in astronomy circles and some confusion over planet labeling. Beginning at an early age, people learn the order and names of nine planets in our solar system. Now, with the recent discovery of 2003 UB313—currently nicknamed “Xena”—that line-up is being called into question. Discovered in January 2005 by Caltech astronomer Michael Brown, Xena is an object bigger than Pluto, has its own moon, and is three times farther away from the Sun. But is Xena a planet? What makes something a planet, and who should get to decide? If Pluto dropped off the list of planets, would you miss it? Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First  Subject Author Date/Time 10th Planet NOVA scienceNOW1 Thu Dec 29, 2005 2:43 pm    Re: 10th Planet brewma Wed Jan 11, 2006 10:38 am       Re: 10th Planet Draygon Wed Jan 11, 2006 5:34 pm          Re: 10th Planet senmut Fri Jan 13, 2006 1:42 am       Re: 10th Planet STARHUNTER Fri Jan 13, 2006 10:41 am          Re: 10th Planet senmut Tue Jan 17, 2006 12:11 pm    Re: 10th Planet Pianodude Tue Jun 06, 2006 2:45 pm       Re: 10th Planet Ocelot Mon Jul 17, 2006 1:14 pm    Re: 10th Planet jrmalatesta Wed Nov 22, 2006 3:10 am    PBS Discussions Forum Index -> NOVA scienceNOW: Stories 2006   Jump to: Select a forum PBS Active Forums----------------Antiques Roadshow FYIArt21Bill Moyers on Faith & ReasonMASTERPIECE CONTEMPORARY: EndgameMASTERPIECE CONTEMPORARY: Place of ExecutionMASTERPIECE CONTEMPORARY: CollisionMASTERPIECE: The Complete Jane AustenMASTERPIECE: CranfordMASTERPIECE MYSTERY: WallanderMASTERPIECE MYSTERY: Foyle's WarMASTERPIECE MYSTERY: The Inspector Lynley MysteriesMASTERPIECE MYSTERY: PoirotMASTERPIECE MYSTERY: Miss MarpleMASTERPIECE MYSTERY: Inspector LewisNOVA: The Bible's Buried SecretsNOVA: Saved by the SunNOVA: Family That Walks on All FoursNOVA: Parallel Worlds, Parallel LivesNOVA: The Big Energy GambleNOVA: Inside the Spy FactoryNOVA: Doctors' DiariesNOVA: Extreme IceNOVA: Last ExtinctionP.O.V.: Tintin and IWashington WeekMASTERPIECE CLASSIC 2009: Tess of the d’UrbervillesMASTERPIECE CLASSIC 2009: Wuthering HeightsMASTERPIECE CLASSIC 2009: Oliver TwistMASTERPIECE CLASSIC 2009: David CopperfieldMASTERPIECE CLASSIC 2009: Little DorritMASTERPIECE CLASSIC 2009: The Old Curiosity Shop NOVA scienceNOW----------------NOVA ScienceNOW Stories 2009NOVA scienceNOW: DispatchesNOVA ScienceNOW: Stories 2008NOVA scienceNOW: Stories 2007NOVA scienceNOW: Stories 2006NOVA scienceNOW: Stories 2005NOVA scienceNOW: About the new series PBS.org Forums----------------The Rise and Fall of Jim CrowThe Merrow Report: First to WorstPBS Campus Message BoardBeyond Brown: Pursuing the PromiseNot In Our Town: Talk About ItRemembering Julia ChildThe Question of GodBy the People: Deciding VotesWide AngleGet Up, Stand Up: The Story of Pop and ProtestRx for SurvivalMonty PythonIndependent Lens: A Lion in the HouseAIR: America's Investigative ReportsThe Victory GardenIndependent Lens: Knocking NOW----------------NOW: Politics & EconomyNOW: Arts & CultureNOW: Society and CommunityNOW: Ongoing DiscussionsNOW: PollsNOW: Enterprising IdeasNOW: Science and Health NOVA----------------NOVA: Darwin's Darkest HourNOVA: Forgotten GeniusNOVA: Judgment Day -- Intelligent Design on TrialNOVA: Marathon ChallengeNOVA: Car of the FutureNOVA: Car of the Future -- Educators' ForumNOVA: Space Shuttle DisasterNOVA: Car of the Future -- Filmmakers' Forum P.O.V. - Talking Back----------------P.O.V.: 49 UpP.O.V.: Wrestling With Angels: Playwright Tony KushnerP.O.V.: LumoP.O.V.: The Camden 28P.O.V.: Made in L.A.P.O.V.: Libby, MontanaP.O.V.: Arctic SonP.O.V.: A Family UndertakingP.O.V.: The Hobart ShakespeareansP.O.V.: Following SeanP.O.V.: Revolution '67P.O.V.: Kokoyakyu: High School BaseballP.O.V.: Sierra Leone's Refugee All StarsP.O.V.: Rain in a Dry LandP.O.V.: Standing Silent NationP.O.V.: My Country, My CountryP.O.V.: Prison Town, USAP.O.V.: The Chances of the World ChangingP.O.V.: Maquilapolis: City of FactoriesP.O.V.: No Bigger Than A MinuteP.O.V.: Twelve Disciples of Nelson MandelaP.O.V.: The Boys of BarakaP.O.V.: Lomax the SonghunterP.O.V.: Waging a LivingP.O.V.: Al Otro Lado (To The Other Side)P.O.V.: The TailendersP.O.V.: The Fall of FujimoriP.O.V.: No More Tears SisterP.O.V.: Omar & PeteP.O.V.: Hiding and Seeking: Faith And Tolerance After The HolocaustP.O.V.: Bright LeavesP.O.V.: HardwoodP.O.V.: In the Realms of the UnrealP.O.V.: The Self-Made ManP.O.V.: The Brooklyn ConnectionP.O.V.: The Fire Next TimeP.O.V.: Street FightP.O.V.: Big EnoughP.O.V.: The Education of Shelby KnoxP.O.V.: Chisholm '72 - Unbought & UnbossedP.O.V.: Lost Boys of SudanP.O.V.'s Voter Motor Mouth - 2004 Campaign WatchP.O.V.: A Panther in AfricaP.O.V.: Freedom MachinesP.O.V.: WattstaxP.O.V.: SpeedoP.O.V.: Every Mother's SonP.O.V.: Last Man StandingP.O.V.: ThirstP.O.V.: War Feels Like WarP.O.V.: Bill's RunP.O.V.: FarmingvilleP.O.V.: What I Want My Words to Do To YouP.O.V.: Love & DianeP.O.V.: State of DenialP.O.V.: SoldadosP.O.V.: The Sixth SectionP.O.V.: Family FundamentalsP.O.V.: West 47th StreetP.O.V.: American AlohaP.O.V.: 90 Miles (Bridge)P.O.V.: 90 MilesP.O.V.: The Flute PlayerP.O.V.: Discovering DomingaP.O.V.: Larry v. 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