Water Ice on Tempel 1 : before , during , and after the Impact Event
نویسندگان
چکیده
Introduction: On July 4, 2005, NASA’s Deep Impact mission successfully executed an impact experiment on the surface of the comet 9P/Tempel 1 [1]. The fly-by spacecraft included two visible color imagers (mediumand high-resolution; MRI and HRI) and a near-infrared (IR) spectrometer [2]. The nucleus was observed prior to impact and the ejecta were monitored for 15 mins. after impact and then later (~45 mins. after impact) during look-back observations after impact [1]. Water ice was detected and mapped in all three phases of observations. We present the identification, spatial distribution, and particle size of water ice [3] and trace its path during impact and in relation to the comet’s structure.
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