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The Cluster Lensing And Supernova survey with Hubble (CLASH) is a multi-wavelength census of 25 massive galaxy clusters with Advanced Camera for Surveys (ACS) and Wide Field Camera 3 (WFC3) instruments of Hubble Space Telescope over a 3.5 year period (2010 - 2013). The gravity of these massive clusters is powerful enough to visibly bend the path of light, somewhat like a magnifying glass and are thus useful tools for studying very distant objects. They also contribute to a range of topics in cosmology, as the precise nature of the lensed images encapsulates information about the properties of spacetime and the expansion of the cosmos. ==History== As of November 2012, the CLASH has surveyed 20 clusters out of the 25. One of the galaxy clusters, MACS J0647+7015 was found to have gravitationally lensed the most distant galaxy (MACS0647-JD) then ever imaged, in 2012.〔(Hubble helps find candidate for most distant object in the Universe yet observed )〕〔(Scientific Objectives of CLASH )〕 In 2013, one study utilizing CLASH data found that RX J1347.5-1145 had intense gravitational bending of light such that 8 images of the same object were detected.〔(F. Köhlinger and R.W. Schmidt - Strong lensing in RX J1347.5-1145 revisited (2013) )〕 (See Gravitational lensing) The Principle Investigator of the CLASH program is Marc Postman. 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「Cluster Lensing and Supernova survey with Hubble」の詳細全文を読む スポンサード リンク
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