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 Wysłany: Śro 6:30, 26 Sty 2011 Temat postu: Periodically |
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| n Is Enceladus. It Is Not Saturn's Largest Moon. It Is Only Five Hundred Kilometers Across. But The Forces That Affect The Surface Of Enceladus Are Very Active. VOICE TWO: Periodically, huge Amounts Of Material Shoot Up From The Surface. NASA Officials Have Called These Events Geysers, like The Hot Water That Is Forced Out From Under The Ground On Earth. Cassini First Captured Pictures Of Such An Event Three Years Ago. The Pictures Have Proved So Scientifically Important That NASA Made Changes To Its Plans For Cassini Just To Study The Geysers. On March Twelfth, the Space Agency Directed Cassini To Pass Only About Fifty Kilometers From The Surface Of Enceladus. Cassini Got So Close That It Passed Through Material Shooting Out Of The Moon. The Spacecraft Was Traveling At A Speed Of Fifteen Kilometers A Second. VOICE ONE: What Cassini Found Has Only Increased Scientists' Interest In The Moon. New Maps Of Temperatures On Enceladus Show That An Area On The Southern Part Of The Moon Is Ninety-three Degrees Below Zero Celsius. Temperatures On Enceladus Are Normally About One Hundred Thirty Degrees Below Zero. John Spencer Is A Scientist At The Southwest Research Institute In Boulder, colorado. He Says The New Temperature Information Makes It More Likely That There Is Liquid Water Not Far Below The Surface. Liquid Water Is Believed To Be One Of The Things Needed For Life. Organic Material Is Another. Cassini Also Found That The Geysers Are Releasing Organic Material. VOICE TWO: Hunter Waite Is An Investigator For The Cassini Ion And Neutral Mass Spectrometer At The Southwest Research Institute In San Antonio, texas. The Spectrometer Is A Device That Helps Identify The Chemistry Of Substances. Mister Waite Says The Chemicals Gathered From The Geysers Of Enceladus Are Much Like Those Found On Comets In Our Solar System. Cassini Found Water, carbon Dioxide, carbon Monoxide And Also Organic Material Shooting From The Geyser. It Is Not Known What Causes The Geysers On Encela |
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