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1、NationalAeronauticsandNASAScienceSpaceAdministrationwww.nasa.gov2013NASASCIENCEChangingthewayweviewtheEarth,ourSun,andtheuniverse.January2013NewFirstFullLastMoonQuarterMoonQuarterSundayMondayTuesdayWednesdayThursdayFridaySaturday12345NewYear’sDay678910111213141516171819202122
2、23242526InaugurationDayMartinLutherKing,Jr.Day2728293031MassiveDeepSpaceDragonfishDECEMBER2012Lurkinginthedepthsofouroceans,DeepSeaDragonfishareknownfortheirfang-liketeeth,largemouths,andbulgingeyes.ThenebulapicturedhereisSMTWTFSlocatedapproximately30,000lightyearsfromEarthin
3、theCruxconstellation—andisnicknamedthe"Dragonfish."Thisturbulentregion,jam-packedwith1stars,ishometosomeofthemostluminousmassivestarsinourgalaxy—theMilkyWay.2345678Themassivestars—withamasseighttimesgreaterthanthatoftheSun—haveblownabubbleinthegasanddustthatmakeuptheradiantne
4、bula,carving9101112131415outashellofmorethan100light-yearsacross(seeninthelower,centralpartoftheimage).Thisshellformsthefish’s“toothymaw,”andthetwobrightspots16171819202122makeupitsbeady“eyes.”232425262728293031Theunseencentralclusterofmassivestarsisheatingupthesurroundingclo
5、udofgasanddustmorethanotherstarclusters,whichsuggeststhatthismightbethelargestmassivestarclusterinourgalaxy.Theheat,orinfraredlight,wasdetectedbytheInfraredArrayCameraonNASA’sSpitzerSpaceTelescope.Thebrightspotsalongtheshell,includingtheeyes,arepossiblesmallerregionsofnewlyfo
6、rmedstars,triggeredbythecompressionofthegasanddustFEBRUARY2013bywindsfromthemassivestars.SMTWTFS12ImageandPartialTextCredit:NASA/JetPropulsionLaboratory-Caltech/UniversityofToronto3456789Artist'srenderingoftheSpitzerSpaceTelescope.10111213141516Credit:NASA/JPL-Caltech17181920
7、2122232425262728125kmNFebruary2013NewFirstFullLastMoonQuarterMoonQuarterSundayMondayTuesdayWednesdayThursdayFridaySaturday1234567891011121314151617181920212223Washington’sBirthday(observeddate)2425262728AustralianSkiesSayHighL.BaykalJANUARY2013Atanygiventime,lookingdownfromsp
8、ace,areasofwhitecloudscanbeseenblanketingdifferentpartsofEarth’ssurf
