摘 要: | Whenwetalkabouttheuniverse,wemeannotonlytheearth,thesun,themoonandthestars,butalsoallthethingstoofarawaytosee.Inthepastfiftyyearsorso,scientistshavebeenableto“see”fartherandfartherintothesky.Theyhavefoundmany“new”stars.Thosestarsarenotreallynew.Theyhavebeentheremillionsofyears.Ofallthestarsthesunisthenearesttotheearth.Youcantseetheminthedaytime.Butifyougooutatnight,youllbeabletoseethousandsofthem.Theearthisoneofthesunsplanets,andthemoonisoursatellite.Itsournearestneighbou…
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