ATLANTA—Tensions in eastern Ukraine and heightened Western fears of a Russian invasion should not have a significant impact on the International Space Station or U.S.–Russia cooperation in space, the former head of the National Space Council told The Associated Press. Four NASA astronauts, two Russian cosmonauts and one European astronaut are currently on the space station. Scott Pace, who served as executive secretary of the space council under President Donald Trump and is now the director of the Space Policy Institute at George Washington University, said the space station “has been largely isolated” from political events. “It’s possible to imagine a break with Russia that would endanger the space station, but that would be at the level of a dropping diplomatic relations,” said Pace. “That would be something that would be an utterly last resort so I don’t really see that happening unless there is a wider military confrontation.” The …