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首页星系壁纸 Portrait of a Galaxy Life

Portrait of a Galaxy Life

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by NASA/JPL-Caltech/CTIO/Las Campanas/Palomar

NASA Image Library · 公有领域（Public Domain）

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Evidence from NASA Galaxy Evolution Explorer supports the long-held notion that many galaxies begin life as smaller spirals before transforming into larger, elliptical-shaped galaxies.

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