Live coverage: NASA’s Juno spacecraft arrives at Jupiter

Critical operations were completed this morning by United Launch Alliance at Cape Canaveral to prepare two rockets for upcoming flights into space.

Engineers are studying a malfunction with the main imaging instrument on NOAA’s GOES-17 weather satellite, launched March 1, that could limit the observatory’s ability to monitor storms, winds and other weather phenomena at night, officials said Wednesday.

The U.S. military’s next GPS navigation satellite was ready for launch from Cape Canaveral at 9:43 p.m. EDT Friday (0143 GMT Saturday) aboard a SpaceX Falcon 9 rocket. But SpaceX aborted the countdown just two seconds prior to liftoff.