Live coverage: SpaceX launch moved up to Wednesday

SpaceX’s second Falcon 9 flight of the year lifted off Jan. 31 from Cape Canaveral with GovSat 1, a U.S.-built satellite funded by SES and the government of Luxembourg to provide secure communications for military and civil defense authorities.

Physicists are gearing up to send a re-engineered science instrument originally designed for lofty balloon flights high in Earth’s atmosphere to the International Space Station next week to broaden their knowledge of cosmic rays, subatomic particles traveling on intergalactic routes that could hold the key to unlocking mysteries about supernovas, black holes, pulsars and dark matter.

Two U.S.-built Intelsat communications satellites have hitched on to an Ariane 5 rocket for launch from French Guiana next week, the first time the storied company has put two of its spacecraft on the same booster.