经过9年对天际的扫描，威尔金森各向异性微波探头(WMAP)航天任务得出了对宇宙微波背景辐射(及宇宙早期“光线”)的观测结论。

After nine years of scanning the sky, the Wilkinson microwave Anisotropy Probe (WMAP) space mission has concluded its observations of the cosmic microwave background, the oldest light in the universe.

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