关键词：土星王国-卡西尼号航天器壮烈探索之旅 Cassini spacecraft was sent its way
TheCassinispacecraftwassentonitswaytoSaturnin1997.Sincethen,shehastravellednearlyfourbillionkilome TheCassinispacecraftwassentonitswaytoSaturnin1997.Sincethen,shehastravellednearlyfourbillionkilometers,deliveredaprobetoatoxicmoon,discoveredphantasmagoricalstructuresontheplanet'sicyrings,studiedthestartlingatmosphereonatinymoon.Now,onadaringspiralorbit,CassiniwillstreaktowardSaturnitself,streamingdatatoEarthbeforebeingtornapart.
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