天文学科普知识详说 (1)

SearchingforMeaningintheUniverse在宇宙中尋找存在的意義Credit:GaryTongeCredit:CaliforniaCarnegiePlanetSearch宣告及讚詞2005年邵逸夫天文學獎得獎人2005年邵逸夫天文學獎將平均分配予傑弗里‧馬西GeoffreyMarcy和米歇爾‧麥耶MichelMayor為表彰最早發現太陽系以外的一個恆星的行星，了解其質量與軌道，從而引導出對行星之產生的革命性的新認識。Credit:FahadSulehria51Pegasib－Bellerophon柏勒羅芬Mass質量0.468MJupiterOrbitalPeriod公轉週期4.23daysSemi-majorAxis軌道半徑0.052AUSurfaceTemp.表面溫度1022°CHotJupiter熱木星Credit:JohnWhatmoughυAndromedaecMass質量1.89MJupiterDistance距離0.829AUPlanetarySystemAroundHD69830Credit:NASA,ESAandG.Bacon(STScI)OGLE-2005-BLG-390LbMass質量5.5MEarthOrbitalPeriod公轉週期10yearsSemi-majorAxis軌道半徑2.6AUSurfaceTemp.表面溫度-220°CRedDwarf紅矮星TransitingExoplanetCredit:NASA/JPL-Caltech/T.Pyle(SSC)Credit:NASA/JPL-Caltech/R.Hurt(SSC)Credit:NASA/JPL-Caltech/M.Swain(JPL/Caltech)Credit:NASA/JPL-Caltech/R.Hurt(SSC)Credit:NASA/JPL-Caltech/J.Harrington(Univ.ofCentralFlorida),B.Hansen(UCLA)Credit:NASA/JPL-Caltech/R.Hurt(SSC)脈衝星Pulsar4U0142+61Whatisaplanet?GalacticHabitableZoneCredit:DonDixonCredit:SaraChenCredit:GaryTongeN=R*•fp•ne•fl•fi•fc•LDrakeEquationN=ThenumberofcivilizationsinTheMilkyWayGalaxywhoseelectromagneticemissionsaredetectable.R*=Therateofformationofstarssuitableforthedevelopmentofintelligentlife.fp=Thefractionofthosestarswithplanetarysystems.ne=Thenumberofplanets,persolarsystem,withanenvironmentsuitableforlife.fl=Thefractionofsuitableplanetsonwhichlifeactuallyappears.fi=Thefractionoflifebearingplanetsonwhichintelligentlifeemerges.fc=Thefractionofcivilizationsthatdevelopatechnologythatreleasesdetectablesignsoftheirexistenceintospace.L=Thelengthoftimesuchcivilizationsreleasedetectablesignalsintospace.Credit:GaryTongeSearchforExtraterrestrialIntelligence(SETI)AreciboObservatory阿雷西博望遠鏡Credit:NAICVoyager航行者探測船GoldenRecordAllenTelescopeArrayCredit:AndrewJ.LepageCredit:BryanChristieCredit:BryanChristieTerrestrialPlanetFinder