Live coverage: Minotaur-C rocket launches with cluster of satellites

After unusual concentrations of hydrogen around the rocket foiled a launch attempt Dec. 19, United Launch Alliance said Friday that the company’s powerful Delta 4-Heavy launcher and a U.S. government spy satellite will remain grounded in California until at least Jan. 6 as engineers troubleshoot a small fuel leak.

Maxar’s eagle-eyed WorldView 3 satellite captured high-resolution views Monday of NASA’s twin Apollo-era launch pads at the Kennedy Space Center in Florida, both now home to new launch vehicles 50 years after humans took their first steps on the moon.

Running a day late, a United Launch Alliance heavy-lift Delta 4 rocket thundered away from Cape Canaveral early Sunday, boosting NASA’s $1.5 billion Parker Solar Probe into space on a daring seven-year mission to “touch the sun” with repeated trips through the star’s blazing outer atmosphere.