When astrophysicist Peter De Cat from the Royal Observatory of Belgium visited Xinglong Observatory in2008,he learned from his Chinese colleague FU Jianning that LAMOST,the new 4m-aperture,5 degree field-ofview telescope capable of acquiring 4,000 stellar spectra at a time,would be open to the Chinese community only.'What a pity,'he thought.However,when his research with NASA's Kepler satellite went deeper,De Cat felt the urge to bring LAMOST in.The significance of such a
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