Question

Opisać słońce po angielsku , pozytywne skutki ,zagrożenia itp. Na 3\4 str A4

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Answer 1

The Sun is thecentral starof the Solar System,whichrevolvesaroundthe Earth, otherplanetsandsmallercelestialbodies.The sunisthe brightestobject inthe skyand the major sourceof energy reachingthe Earth.

Although theneareststarhas long beenintenselystudied,manyoftheissuesremainunresolved.Itwas not knownexactly theheatingmechanism ofthe outer layers ofthe solaratmospheretotemperatures ofa millionkelvin.

The sunisvery hot.
Sometimesin the summerwe goto the courtwithout acap, we canget astroke.

Ball ofplasmaismaintainedinhydrostatic equilibriumby the forceof gravitylocatedabovematteron the one handandincreasingwith the depth ofthe gas pressure.Inthe case ofmain sequence starsthe nuclearreaction,which provides the energyis the transformationof hydrogen inhel.Gęstośćmatterinthe nucleusof the Sunis 1,5× 105kg /m³,hightemperaturekeepsthe matterinplasma state,while thegas densityat the surfacedecreasesapproximatelyexponentiallyinthe photospherethe surfacearea consideredis10-4kg/m³, whichisalmostpróżnia.Nabasisof differentpropertiesplasmandprocessesoccurringinit,which result from differencesindensityandtemperature,there are threedifferentareasinsidethe Sun.

Afterbouncing offthe layers,whichdecreasesthe pressuresound wavesbackinto theenvelope.Because thespeedof sounddepends ontemperature andincreaseswithdepth,the trajectory ofthe waveis nota straight line.As a result ofbendingwavecanreachonly alimiteddepthand then returnsto the surface.Sowaveorbitsthe Suninside thesphere inwhichit istrapped.Based onthe oscillation frequencycan bedeterminedhow deepthewaveis reflected,andknowingitsvelocitycan bedeterminedproperties of thegas,whichpassesthrough.Onthis basis,determined, for example,stockmarket ofthe individuallayers.

It is believedthat the Sunformedabout4.6billion years ago.After afewmillionyearsduring thecontractionof interstellarclouds,the sunwasuponthe main sequence.Over4.6billionyearsthe sunhas increaseditsradiusfrom8 to12%andbrightnessby about27%.The hydrogen contentinthe nucleusof the youngSunwasabout73%, nowonly40%.According to thehypothesis,forseveralbillionyearswillstygłountil it becomesawhitedwarf,the universeisstill too young,that there aresuch objects.

Solar radiationisa streamof electromagnetic waves andelementary particlecorpuscularradiationfromthe sunreachingthe Earth.The intensity ofsolar radiation reaching theupperatmosphereis determinedby thesolarconstant.Influenceof solar activityonthe intensity ofsolar radiation reaching theEarthissignificantlysmaller andthe average11yearcyclereachesabout 0.1%.spectraldistributionof solar radiationis closetoblack body radiationata temperature ofabout5800KPlanckdistributiondescribed.Maximumenergy in accordance withWien'slawfallsona wavelengthof about0.5microns.Abouthalf of thesolar radiationin the range ofthe visible,theremainderofthe ultraviolet andnear infrared.