NASA’s top administrator says the U.S. is in a new space race with China and warned that a Chinese win could result in the country claiming to “own” vast swaths of the moon. NASA administrator Bill Nelson, a former astronaut and Florida senator, warned that it is entirely possible that China would cordon off the most resource-rich areas of the lunar surface if they establish a presence there first, Politico reported Sunday. “It is a fact: we’re in a space race,” he told the outlet. “And it is true that we better watch out that they don’t get to a…