BOISE, Idaho—If anyone has a good idea on how to put a nuclear fission power plant on the moon, the U.S. government wants to hear about it. NASA and the nation’s top federal nuclear research lab on Friday 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. “Providing a reliable, high-power system on the moon is a vital next step in human space exploration, and achieving it is within our grasp,” Sebastian Corbisiero, the Fission Surface Power Project lead at the lab, said in a statement. If successful in supporting a sustained human presence on the moon, the next objective would be Mars. NASA says fission surface power could provide sustained, abundant power no matter the environmental conditions …