NASAのインスタグラム(nasa) - 4月13日 03時20分
One of the Hubble Space Telescope’s greatest triumphs has been the clear view it has given of very distant galaxies.
Is going to space worth the trouble? Paul Hertz, NASA HQ Astrophysics division director, talks about how Hubble completely changed his mind. #Hubble25
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2015/4/13