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Astrophysics picture of the day for December 11, 2018
Picture of the Day
Is there a waterfall in Orion? No, but some of the dust in M43 appears similar to a waterfall on Earth. M43, part of the Orion Molecular Cloud...
Photo of Riccardo Giacconi
Latest Science News
Remembering Riccardo Giacconi, X-Ray Astronomy Pioneer

NASA is saddened to note the passing of Riccardo Giacconi, who had a long and illustrious career with the agency.

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