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The SIR-2 instrument is a redesigned, highly compact, monolithic grating, near infrared spectrometer chosen to be a payload on the Indian Chandrayaan-1 satellite. It is an ESA project, and is built by Max Planck Institute for Solar System Research, Polish Academy of Science and University of Bergen. == Mission == The mission of the instrument is to map the lunar surface in the near infrared spectrum from 0.9 - 2.4 μm with an unprecedented resolution of 6 nm. The purpose of this is to obtain information on the mineral composition of the moon, which in turn will help getting insight into a number of questions: * What is the cause of the global asymmetry of the moon, which on the far side has a thicker crust and lacks the Mare structures which are characteristic for the near side? * What was the early thermal evolution of the moon? * What is the vertical and lateral structure of the lunar crust and how did it develop? * What is the composition and structure of the lunar mantle? * Why is the moon different from other planets and how do planets work in terms of surface processes, heat transfer, and geologic evolution? * Are the Apollo geophysical measurements representative of the moon, or are they only valid for the small regions around the Apollo landing sites? 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「SIR-2」の詳細全文を読む スポンサード リンク
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