by AP SAN JUAN, PUERTO RICO - European space officials on Tuesday postponed the launch of a three-year mission to study planets in other solar systems shortly before it was due to blast off. The European Space Agency announced that the launch from Kourou, French Guiana, of the Characterising ExOPlanets Satellite (CHEOPS) mission would be delayed by at least a day. It had been scheduled for 0854 GMT (3:54 EST). ESA Director of Science Guenther Hasinger tweeted that "a software error in the Fregat upper stage" of the Soyuz rocket was responsible for the postponement. "With this complex mission, we…
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