(The earth’s shadow covers the full moon during a partial lunar eclipse, early Friday, Nov. 19, 2021, in Kansas City, Mo. NASA and the nation’s top federal nuclear research lab on Friday, Nov. 19, put out a request for proposals for a fission surface power system. NASA is collaborating with the U.S. Department of Energy’s Idaho National Laboratory to establish a sun-independent power source for missions to the moon by the end of the decade. AP Photo: Charlie Riedel)
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